Not sure if it's in the suggested thread... .but... something I see alot of players making a mistake with is, while they're sitting on 12-18bb's they open with a raise and then fold to a reraise. If you're going to open with a stack of that size (if there are others who are alot deeper obv) then you really only want to open with a hand you're willing to committ with.
Or while on a ~20bb stack and they 3-bet fold to an EP raise & shove (is that going to be translated on Google Translate?...hmm... okay then.. if a player opens with a raise and you have a stack of approximately 20 big blinds, don't re-raise them and then fold to a shove << I was railing this guy last night on a Fulltilt final table and he made this mistake and the one above a few times, knocking himself down from sitting with the 2nd biggest stack to the 2nd smallest.. it was kinda sad. I guess he just wanted to move up one more spot or so???).