Me i know that my game is suffering when :
I'm feeling strange/hot or unusual.
I feel as if i forcing me to play and not play because i want to.
This make my game suffer as i will become a mouse just being tight and stop to raise even with premium hand.
When i'm on tilt i set goals too which may be negative >_< but most of the time i reach the goal of break-even.
When i'm starting to sleep on desk with my read up just watching the screen from a lower perpective and just clicking lol
All these make my game suffer and i know i should stop to play but i can't stop
Ahh when you ask yourself also when your session will end lol
hope this help a little