It's hard when you are the one that in situation, easy to say that control and discipline are needed, but when you are enjoying or when you feel something that increase the adrenaline inside you, it's a tough call to quit or stop your session, most of the time emotions really dominated your plans, you'll remember about your set limits when there's nothing you can use to play, it's just a simple regret that will remind you of that same mistake that you commit after playing.
There's no doubt about it, it's happened to me many times, but the trick is having the discipline to say I'm not playing anymore, and that's when the money runs out, or at least the money you were willing to spend in the casino If that's the case, you have to have that willpower and discipline.