I agree with you about concentration. I play every day for 2-3 hours, if the game goes, it happens and much more. Let's say I register for several tournaments every day, play on two tables, lose concentration and lose. A friend of mine plays rarely, but accurately. Yesterday, after a week's break, he took 1st place in a good tournament. There are times when you feel that it's time for you to rest, and you should listen to your feelings.I usually only play like 3-4 hours straight, after that I start to lose focus....