In my case, I have calculated limits for gambling, like Charles-Tim, instead of loses. I mean, I spend a certain amount, no matter if I win or lose. I personally prefer it rather than thinkin: if I lose x amount, I quit for today/this week.

swogerino, these amounts you mentioned are insane! I intuitively believe that, unless you're rich, one shouldn't spend more in gambling than what he spends in eating. Of course, we are free to do what we want with our spare money, but these amounts seem too much for the average Joe.