Back when I was still playing dice, I always have a set of stop loss and target profit. If i reach either the set amount for loss or win, I will stop gambling. But now, I only gamble on sports betting so it is easier to manage. I only bet on one sports and it is a set amount.
Yeah even I prefer to bet on sports as I find it bit easy and if are aware about the game then you can determine the results and if I make profits from it then I prefer to leave the game without going for more as in that case it may make me loose my money in next game.