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.
I spent a lot of time sitting, because computers are both my work and my hobby. I was thinking about solutions, and I had a few ideas, but I procrastinated for years.
Recently, a health problem made me look for a solution immediately. So I put a huge plastic box on my table, and put the monitor and keyboard on the top of the box, and now I use the computer while standing. At first it felt weird, and I quickly got tired. But after a few weeks, my body adapted and now it feels natural. And the health problem that inspired this change is mostly gone.
Another positive side effect is that the "activation energy" needed to leave the computer is much smaller when I am no longer sitting. Yet another is that my 2 years old daughter no longer tries to climb in my lap whenever I try using the computer.
From the rationality perspective, it is quite humiliating to notice how long it took me to finaly address a problem that could have serious health consequences, and how little time and effort the actual solution required, once the gun was metaphorically pointed at my head.
(To be honest, I am not completely satisfied with this solution, and would like to replace the plastic box with something better... not sure what exactly. But the difference is that now I procrastinate on minor improvements, having already solved the critical part.)
Adjustable-height desk toppers exist!