The only way to gamble without losing (ever) is to not gamble. Any other answer is wrong. If you want a 99.99% chance of making a profit you need to make a really really safe bet and once you one ONCE, walk away.
Yes I agree, when we are gambling and only thinking of win is imposible, of course when we lost we will stress. We will never 100% gambling win, because gambling is very depending on luck.
Make gambling as entertainment, don't ever think of as fixed income. I felt between winning and losing is the same, so I am just looking for fun only.