Setting win limits is a very important task among gamblers. Some gamblers continue their gambling activities even after receiving more winnings or bigger wins.
In as much as gambling is concerns we shouldn't place all our focus on gambling, or using all our money on gambling with the hope that it will work for us and perhaps if it eventually fails it becomes a setback for us, but perhaps having a job could also help our mindset in times of gambling were as all the attentions will not be channel only on gambling but for other things too, also with that someone can easily control his method of gambling or perhaps just like you said it will also be good if we should set a target of wining or losing that whenever you losses or wings a certain amount you should call it a day instead of betting beyond that.