In poker, what a difference a day makes
But one thing that does affect my game is being tired. Usually it's the kind of being tired that I don't even realize until it's too late. That's usually when I'll be prone to calling instead of folding, etc.
The next day, however, everything is much clearer. Poker continually reminds me of pitching in baseball -- you're much more apt to be at your best when you're fresh, when you play with aggression and control and when you play within your physical limits.