One of the most important factor of a successful gambler is to know when to stop, most gamblers expecially the addictive type don't even know what is stop when it comes to gambling. So it's very important to;
* Stop when your losing is now getting to you.
This is a sound advice, we should stop if we are getting frustrated over our losses. This will not only empty our pocket but also deteriorate our health.
* Stop when you are now feeling as is you can't do without gambling.
This is somehow hard to execute but I also think that one should regain control over his gambling session, if he can't control is gambling activities it is wise to stop before our being hooked on gambling ruins our lives.
* Stop when you have a big winning, by channeling the money somewhere else so you won't lose it back to gambling.
I agree, we must withdraw the money from casino once we won big amount. There is tendency, if we are not careful that our wininngs together with our initial bankroll to be emptied our as we continue gambling despite the huge win.
* Stop when you are not even winning at all, it's not your thing.
Or it is not our lucky day, stopping is a wise decision since it saves us from unnecessary bets. It is better to stop before emptying our bankroll, who knows luck might be in our side on our next session. So saving the rest of bankroll when we feel that we are not lucky enough to bag a good win.