Sometimes, people have life problems that can be entirely solved by doing one thing. (doing X made my life 0.1% better, PERMANENTLY!) These are not things like "This TAP made me exercise more frequently", but rather like "moving my scale into my doorway made me weigh myself more, causing me to exercise more frequently" - a one-shot solution that makes a reasonable amount of progress in solving a problem.
I've found that I've had a couple of life problems that I couldn't solve because I didn't know what the solution was, not because it was hard to solve - once I thought of the solution, implementation was not that difficult. I'm looking to collect various one-shot solutions to problems to expand my solution space, as well as potentially find solutions to problems that I didn't realize I had.
Please only put one problem-solution pair per answer.
Ah, right. Twix. I forgot about this one. While depressed, I gradually ramped up my consumption of Twix from the vending machine near my office to over 1 per day (2 since they came in pairs?). I wanted to stop, tried several times and failed, remembered about a technique I'd seen on LW. Tried it. Have not had a single Twix for many years.
Technique: bought one Twix. Slowly, mindfully, broken off pieces and threw them in the trash, carefully imagining that I was tasting the Twix and that it was full of maggots. Took... a few minutes? Craving gone.