There is something out there called the law of diminishing returns. While this particular law generally refers to resource allocation and productivity, the words can apply to somebody sitting at a poker table.
Winning is not a constant state, and for a lot of people their best poker is played during the first few hours of a session. Just like the least amount of work gets done on Friday at businesses across the planet, or near 5:00 pm on any standard work day, the longer a player stays in a game, the more the quality of their play will degrade. So when is a good time to put the cards down and call it a day?
Well if you're losing, and can't seem to turn it around, the answer is pretty obvious. Chasing pots and becoming more desperate will not do you any good and instead of allowing a bigger dent to be put in your bankroll, you should just fold and come back to fight another day. When to quit when you're ahead is a slightly more difficult question.
Most people do not bring their entire bankrolls with them to the casino, and actually that's right. When you do bring a piece of your bankroll though, and when you win 50% to 100% of the value of your original bankroll, it is probably time to start considering bringing your day to an end. Getting greedy often, ironically, leads to losing more money than you would gain.


