Maybe you should remember about your losses when you hit and get a big win. But more than that, some gamblers belief that you have more patients to loss your money than to get it back just to get a title of a big winner.
I don't remember how much I losses in gambling because if I did that, it would make me sad, and I will try to recover the losses. That will be difficult for me because I don't have good luck in the gambling games. And if I try it with so hard, I will only get more losses, and I realize that will makes I broke. I am trying to playing gambling, but I don't use so much money because of the big risk in gambling, and I try to accept the risk.
One point when you remember those loses that you've made will keeps you dragging back to try to recover everything and it's bad when you are playing, you should be able to get along with risk and find enjoyment while dealing with this activities, it's good to keep the entertainment when receiving the luck that you get once you win big, instead of remembering those loses and kill the fun.