I always look at my biggest losing hands. If they are junk, then don't play them. If they are marginal hands, look at the positions you play them and how you play them. If they are good hands like AQ, then you have to evaluate how you play them. When I first got PT, AK was a losing hand because I was limping and then playing it hard often. Once I figured that out, I turned that stat right around and AK is now one of my best. Unfortunately, I don't play on sites that support it currently.