In my honest opinion, the smartest way on being a gambler is not to be so greedy on betting. I always believe that if you win some you will definitely loose some,... So better, set some goals on your side. If you think you have already loosed enough, Better stop and say for yourself. I am off for today, Better luck next time.
Your suggestion is very smart but we cannot put spirit on this one if we don't implement it while in gambling, it need a lot of discipline to be successful in a risky game like gambling.
Thats true and you can ever think in that moment when playing gambling that you must need to stop for now. It needs more round of game and I think you lose already what you didn't wanted to loose and cannot afford to lose before you realise you need to stop for today and better luck next time. We need to understand that in gambling house it needs more discipline and limitations to yourself.