I take responsibility for my losers, because I take responsibility for my winners too. I monitor my mark to market diligently for every trade I place. If markets move against my expectations, for or against me, I continually evaluate whether my original conviction still holds or whether, they have been superceded. They could be superceded for or against me. Either way, by monitoring every live position diligently, I can act accordingly. Focus on your trades and, even if your strategy doesn't improve, your ratio of winners to losers will rise.