Most of the times, I am always in that situation. It's a situation where your mind is extremely conscious of how the outcome of gambling can be unexpected. When I want to place my bet, I usually have the thought of "what if this your selection is totally wrong and cause you to lose? " Whenever such thought comes up, I would just silent the thought with another voice in my head saying "just be positive for once. " Sometimes, the result is negative just as I earlier thought about it and at that point, I would still think that I was the one that washed myself a bad luck.