I'm just gonna add: Say "Sir" all the time. It really calms them down.
He asks you a question? ("have you been drinking?") Say "Yes sir" or "no sir"
"I stopped you because you were speeding" - "I'm very sorry, sir"
and so on. This has saved me countless times.

How should you interact with a police officer - what are your obligations, your rights, and how should you conduct yourself?

I'm a law student. I'll take this one. This applies to the US specifically, though being polite and deferent are probably universal.

In short: TL;DR answer: Be polite, calm, and friendly. If you are guilty of a crime, admit nothing, do not give permission to search anything that would be incriminating, say that you don't want to talk to the officer (unless answering extremely general questions), and, if you are detained, ask to speak with a lawyer. Be more compliant if you are innocent, but if you get the slightest hint that they think you're responsible, stop complying and ask for a lawyer if detained. For more mundane interaction (i.e. speeding tickets) be polite and deferent, and don't confess to anything unless they totally have you nailed. Arguing with cops will very rarely advance your case; save that for court if you care enough to challenge the ticket. More detail follows.

In minor cases (e.g. speeding tickets), you generally want to be polite, deferential, and honest, but probably don't volunteer too much information, except insofar as it's obvious. If you were going 85 and the cop asks why he pulled you over, it's probably wiser to admit you were speeding than to play stupid; in some borderline cases, being honest and likable will get you out of a ticket or into a lesser ticket. Arguing with police officers is generally not going to get you anywhere. If they're wrong about some material fact, you'll probably have to deal with it in court. Being calm, friendly, and deferential (address them as "officer") is often your best chance of avoiding a ticket, and will almost always avoid any escalation. In some cases, crying or explaining yourself may work, but if they don't believe you, it may make things worse. Similarly, if you made some mistake (i.e. did not see the speed limit change) it may be helpful to say as much politely, but again, you won't win an argument.

For more serious offenses (basically, anything criminal greater than a speeding ticket).

Edited to add: Basically, never talk to the police or other similar authorities under any circumstances, except where it can't be avoided, e.g. speeding tickets.

A police officer is either detaining you or they are not. If they are not detaining you, you are free to stop talking with them and leave. If they are detaining you, you have the right to remain silent and the right to an attorney. If you are being detained, and you ask for an attorney, ALL QUESTIONING MUST CEASE. Anytime you hear a story about some guy the police were grilling for eight hours: if he'd asked to speak with an attorney, they'd have had to stop.

In general, if you even think you might be guilty of something, it is best not to try to explain yourself and not to make up excuses. Most criminals don't think they did anything morally wrong. The police will not share your perspective. Especially if you are guilty, you should ask if you are free to go, and if you are not, ask for an attorney. This is advisable even if you are innocent if the crime is significant.

The police CAN legally lie to you in order to exact a confession; this is a rather common tactic. That means they can tell you someone has positively ID'd you, or tell you that your fingerprints have been found, or that your accomplice has turned on you even when these things aren't true.

Of course, if you actually have an accomplice, you should hope you've both credibly committed to cooperating in a prisoner's dilemma. Omega cannot save you now.

You should never give police permission to search anything unless you know that there is nothing incriminating there. If the officer tells you that the law entitles him to do something, and then ask for his permission, you should probably tell him that he does not have your permission, but if what he says about the law is true, you're not going to stop him. Even if the police find incriminating evidence, if they did not have a legal right to search where they were searching (i.e. they lack probable cause), that evidence generally cannot be used against you in criminal proceedings.

If police are questioning you about someone else (who is not a spouse) who may have been involved in a crime, it gets fuzzier. I'm not entirely sure how extensive police power is; ultimately, the state has some capacity to compel your testimony (there's no right not to incriminate others), but this generally doesn't work because someone who doesn't want to testify can generally testify to a lack of memory on whatever issue (as people might do if threatened by the mob).

It's also worth noting that roommates and people living with you can, under certain circumstances, authorize searches of your possessions. They can certainly authorize searches of common areas.

This is endlessly more complicated, but this should be a pretty good overview. You cannot be compelled to say anything incriminating, and if the cops are bargaining with you, that probably means they don't have enough to get you on. Again, if you've done something, or if they think you've done something, you're going to want a lawyer to sort things out. The risk is obviously a lot higher if you're guilty, but you can run into serious risks even if you just seem possibly guilty.

Thank you. I mean the looted ones too, I don't think everybody knows about them.

For example, here is a technique I always thought it should exist and simply cannot find it, nowhere at all, maybe it doesn't or maybe I am just really missing something: I have always thought that with something like rapid breathing I should be able to stimulate my central nervous system the way say amphetamines do it, to temporarily be quicker thinking, physically faster, and ignore fatigue, it would be handy in many situations, really this is something that probably exists because if the CNS can be stimulated at all then probably not only through chems, and I am probably just overlooking something. Maybe there is a tribal people somewhere who do this jumping up and down and chanting, calling it a sacred rage induced by the war god or something.

If you're trying to extinguish an eating habit alter your sense of taste for the period in which it's a problem. The cheap and easy way is with mouthwash. If regular mouthwash doesn't last long enough chlorhexidine mouthwash (marketed as "clinical strength") will alter taste for around an hour or two. This may be useful for intermittent fasting and reduction in caffeine consumption.

I interpreted the suggestion is being about fastly moving money into and out of Kiva and not doing loans with the usual maturation time.

In addition, if you want to make money because a system of an organisation is broken, don't screw organizations like Kiva that produce a lot of public good.

I wouldn't know about magic cards, sorry.

Stamps would be my choice because they have many advantages over other types of collectibles. Magic cards may share many of the benefits stamps have over other collectibles considering the similar format, but stamps surely have special perks magic cards don't.

Stamps have the advantage, that they are the number 1 collectible in Germany and many other parts of Europe and they have been forever. Coins and other things don't come close in terms of how widely they are collected and the bigger the demand, the easier it is to monetize if you have a worthwhile collection that is interesting to the collector base. There are stamps which one can assume will be interesting for many decades to come - there is for example a deep fascination with the Third Reich so stamps that came from Germany and the occupied territories during that time are generally sought after. What's also interesting is "catastrophy mail", that is mail that was delivered on planes or zeppelins that were destroyed while the letters themselves could be salvaged from the wrecks.

There are many nieche topics that stamp collectors could choose to base their collection(s) on, which may indeed suffer from vaning interest over time in the collector base, but there are also some other topics that will probably remain interesting in the very long run and thus demand will always be there and fluctuate less than the demand for other topics.

I know that magic is huge but will it remain so for another fifty years? (Assuming the absence of apocalyptic scenarios). I'm quite sure stamps will be there because they are carrying historical information and are an integral part of the first "reliable" long distance communication technology humans managed to make work (apart from books perhaps, though they usually had no specific individual as recipient in mind and thus really are quite a different communication technology).

I started doing this a while ago.

There are a lot of fake memory cards going around on ebay. You can tell they are fake because they are going for a lot less (a third or less of the price, exact amount varies) than other places. They actually are just hacked to be less capacity than they claim. You can verify the exact capacity by using a program called h2testw.

I buy a few cards, wait for them to ship, dispute the transaction, and usually I get the money back without having to send back the item. (Once I had to send it back, but ebay paid for the shipping. Usually not, though.)

Viola, free memory cards. If you have paypal credit, it's even better, as you don't have to pay until later and you may cancel it before the payment is due. I'm ripping off scammers, so no ethical problems either.

7 minutes scientific workout http://www.youtube.com/watch?v=Itye1DEJTQk

Just tried it. it is tiring, but far from 8 on 0 to 10 discomfort level which was claimed somewhere in Lesswrong, though maybe it is for people who weight more than 75 kilos.

Interesting. I tried a dust mask before when riding my bike because I was annoyed by breathing car exhaust. I should not have been surprised by how much harder it made breathing in general in retrospect. Perhaps a mask with minimal filtering would be okay, but anything more makes breathing very difficult. Such masks are not designed for when you need more oxygen than normal, and such a mask might not even be possible. You might need something like a SCBA.