So you got your racket strung too tight and you don't want to waste $30 getting it restrung, or you're too lazy to string it again. Some people put weights on the string or step on it, which is not effective and could harm your racket. My solution, is to put cuts or slices on the main strings/artificial notch it with a blade. If you're really cheap and you're using full poly. Keep moving the cross strings up and down, so you'll create natural notches in multiple locations. Using my tourna string meter, I've gone from 50lbs avg to 20lbs avg. However, I don't recommend doing this regularly, because you will never get a consistent feel if you keep moving your crosses up and down. Only do this, if you're trying to find/ballpark your desired tension and don't want to cut out your strings after 1 day.