The correct answer is that you should only stop playing when you aren't playing your A or B game anymore.
However, the problem is that as a human being, we are grossly incapable of judging our own performances real time. We think we are, but we are not.
The solution that i've come up with is to track my play and keep a poker journal. I look at my wins and losses and I try to find trends. Then based on the trends I've developed a series of rules and warning signs. When I run up against a rule or warning sign THEN I stop playing.
Personally, one sign is when I lose more than 3 buy-ins. So, I have a stop loss of 3-buyins.
I have a post on this somewhere, see if I can't dig it up.
http://forumserver.twoplustwo.com/sh...2&postcount=10
Also do the opposite. Identify the key trends of your good nights and then figure out the point where good turns into bad (i.e. you start giving it back) come up with a series of rules and warning signs when that happens, and then when you recognize those signs while playing. Stop.
For instance, with me, when I start winning big and then start calling preflop raises with bs like T9o, then I know its time to go. Or, if I start arguing poker theory at the table (which is a NO NO) then I know I need to GTFO.
Lastly, keeping a poker journal really helps you figure all this stuff out
http://forumserver.twoplustwo.com/26...ge-you-638780/
EDIT: sorry is my post is incoherent, I bounced in and out cutting and pasting and I have to run out the door so no time to edit.
Last edited by dgiharris; 10-22-2010 at 04:50 PM.