Tuesday's poker guide discusses when you should consider quitting a hand, a session or even the game.
"Any time you sit down to play a game, whether it be a board game, card game, or online game, part of your thinking needs to be when will you quit. If you are playing a fun game with little or no consequences, then you can play for as long as you are enjoying the experience. When you are playing online poker for money, the dynamic shifts considerably. You are playing for real money and each of your decisions each has a consequence. Poor decisions can lead to lost money and morale. It is important to prioritize both when you should start and stop playing poker."
The article can be found in the beginner guides sub section of poker guides area of the poker section in the sub tabs.