When you have suffered from great and consecutive loses, you must know to yourself that you really have to stop gambling. Also when something is not right with your lifestyle and relationship with the people around you cause by gambling.
Well, that's when you had enough in your gambling life. For sure the best thing to do is to really stop when you are already suffering to much loss.
But when it comes to daily gambling, I prefer putting a limit to my betting and my bankroll. Like putting just a small amount of money for a day in my bankroll and using it all, then if I fail, stop, if I win double, that's enough, no need to be greedy, besides there is always another day for you.