None of the above for me, I stop when I've exhausted my gambling budget for the day, it doesn't matter whether I'm winning or losing. I base every expenses that I'll make within the duration that I receive my income and before I receive another income. So there's no how that I can overspend except it's an emergency expenses which gambling is not among. When you make budget for your expenditures and you're disciplined not to exceed the percentage that is mapped out for gambling,, the question of when to draw the line will not arise. If you gamble with the amount that you can afford to loose and don't chase loses, I think that you'll be very fine as a responsible gambler.