Summary of best comments on the original repository
The best advice posted (best comments) in the original repository included (I blatantly pirate-copied it over from their various authors):
Avoid commuting, or failing that, commute effectively (i.e. by train or bicycle and not by car, so you can do some useful work or exercise).
Start your posts with a summary if it's more than 3-5 paragraphs. Use paragraphs.
Treat craigslist as a free storage. You don't need to physically own all the tools if you can pick them up for <(0.1 paychecks). Treat those things as if you'd already own them. Pick 'em up when you actually need them.
Spend more effort (money, time) on optimizing things you regularly use, such as clothing, matresses, hygiene products, kitchen accessories, and ergonomic computer hardware.
If you are trying to do X, surround yourself with people who do X. E.g. if you want to read, go visit a (university) library.
If you are looking for a job, tell everyone you know. Many jobs are gained through personal connections. Post on facebook.
If a complete stranger or an acquaintance can do something useful for you, ask. (Politely. At a convenient time. With an appropriate amount of honest flattery.) If they say no, don't press them. Always remember to thank them twice: After they agree to help you and again after they've actually helped you.
Obtain a smartphone. Use it to look data (wikipedia), directions, prices (amazon), and places (yelp), record memos and various data, and read emails. Also, set alarms.
Learn to cook at least a handful of simple, cheap, fast meals.
Never post a web link that requires readers to click on it to find out if they want to click on it.
Observe the 80/20 rule for cleaning. Better clean twice as often less efficiently than waste a day cleaning stuff thoroughly.
When in need of a conversation topic, ask a question about the other person's life. Anything about their life. People like to talk about themselves.
Always negotiate the salary when being accepted for a job.
Lots and lots more, from habit formation to winter clothing. Just take a look.
Never post a web link that requires readers to click on it to find out if they want to click on it.
Ha. Depends on your goals.
If you are Buzzfeed or otherwise a click-farmer it's "Make each web link seem like it leads to life-revolutionizing information, with only tangential regard as actual content".
Or tab-exploders like TvTropes or even Lesswrong at times- "Give links obscure and cool words which just barely hint at something novel and unusual without revealing it, and include as many of them as possible per paragraph"
This is the first post of the 2015 repository rerun, which appears to be a good idea. The motivation for this rerun is that while the 12 repositories (go look them up, they're awesome!) exist and people might look them up, few new comments are posted there. In effect, there might be useful stuff that should go in those repositories, but is never posted due to low expected value and no feedback. With the rerun, attention is shifted to one topic per month. This might allow us to have a lively discussion on the topic at hand and gather new content for the repository.
The first repository to be rerun is the Boring Advice Repository, because of... on a whim.
Enter original motivation (by Qiaochu_Yuan):
The Boring Advice Repository is filled with lots of diverse advice, I've summarized some of it in a comment below.
So what should go here? To go with Qiaochu_Yuan again (adding emphasis):
I don't know if you should post new advice here or in the original repository. Perhaps search the old repository with ctrl+f (when on windows) and if you don't get results, post it here.