In general before I start gambling I always check how I feel that day. If I feel like "woaw this is my day!" I tend to play it. I sometimes do some mantras. Like I think about my grandfather and grandmother, ask them to please help me with next lucky game etc. I also love to not ever mention to people about it at the day I gambled. I think its more valuable when its hidden.
But what about the result, does it always win?
Because I personally also sometimes feel about good things before starting to bet, but the results obtained are not always good and do not always match what is expected. So in that case, I personally don't really believe in any spell to gain profit in gambling. Indeed, there are spells that may be applied in many things in life, but those spells still don't always work and sometimes they still fail and don't work so for me spells are like an illusion.