A Munchkin is the sort of person who, faced with a role-playing game, reads through the rulebooks over and over until he finds a way to combine three innocuous-seeming magical items into a cycle of infinite wish spells. Or who, in real life, composes a surprisingly effective diet out of drinking a quarter-cup of extra-light olive oil at least one hour before and after tasting anything else. Or combines liquid nitrogen and antifreeze and life-insurance policies into a ridiculously cheap method of defeating the invincible specter of unavoidable Death. Or figures out how to build the real-life version of the cycle of infinite wish spells.
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.
Wear a rubber band around your wrist and snap it to decondition behaviors. I originally used this to stop myself cracking my knuckles or biting my lip, but it didn't have any apparent effect.
I then tried using it to destroy my sense of humour (partly because I thought this might boost productivity, by generally making actions' dopamine rewards match their actual usefulness). This seemed to actually work well; I now experience humour-type amusement 20%-50% as often as I did two months ago.
I would recommend other people think carefully before trying this; many people have told me this could lead to bad places.
Relatedly, you could get an electroshock collar (used to train dogs, or for BDSM), which would let you automate the deconditioning.
I've slapped myself in the face to stop paying attention to car brands, after having had to pay attention to car brand symbols for a while for other reasons. Worked.