Most of the gamblers are not succeeded in gambling because they do not play gambling with limit, they play with everything they have, even if they will make a lot of money but still they are not going to stop it for the time, they try to make more and more money from gambling which in last cause a big lost and nothing else.
I agree with you and this is a mistake that we did in gambling games and we should be aware to not make the same mistake. it is better to make a limit in the gambling game so we can avoid getting loss all of our money and we can leave the place with the money insides our pocket. maybe we can try our luck in the other day and who knows we can win the games with easily.
But in general, a good gambler can stop when they want and will have a limit and will never go beyond that limit. This took a lot of my time and money but I managed it in the end. I can play when I want and I can stop when I want, I can gamble for $50 for a whole day and if I set the limit at $50 then I will never gamble $51 not a single chance for that. I will stop and leave my computer before I go and bet another single cent over it.
If you can get that self discipline than you can become a good gambler as well. Keep calm, don't panic, do not get cocky and play it like its a "game" not like your whole will change in a second, it probably won't.