For me, I would say you start by setting up a budget on how much you are willing to spend and don't go beyond the figures. Furthermore, you have to understand the probability of winning and losing -- never get too carried away by the odds you see there and don't allow emotions to controls you keep your mind calm.

Remember gambling should be done responsibly and within your means. Never gamble with money you can't afford to lose. It hurts so much when you lose all your money to gambling. There are people that take high risks because they are chasing a higher reward, but mostimes it goes against their predictions. You wouldn't know how you'd react to a situation like this until you get into one yourself.