Winning big is a big hope for everyone who gambles, but achieving that victory isn't easy. I've been struggling to find and devise new strategies to win, as they always end in defeat. However, I haven't been able to completely abandon gambling from my daily life.
It's too much of a hassle to devise a strategy, as the house always has the advantage over its players. I just wait for my luck to strike. What I'm doing now is reducing my gambling and betting activities and reducing the amount of money I deposit each time I gamble and place a bet.
Though, I don't understand what OP means with "strategy", to me the term and the implications of an "strategy" is completely alien when comes to gambling because it does not matter what "strategy" we apply, the edge will continue to carry on its effect onto each one of the session of gamblers.
When comes to gambling and casino games there is no strategy which can be applied to those games in any way shape or form. The only thing we can do about about gambling and self-preservation is bankroll management. It is different in sport betting though, there one can have an strategy based on actual analysis on data publicly available on the internet.
Anyone who believes there are strategies which can guarantee some profits in casino games needs to educate themselves better and have some basic classes of statistics.
I have even seen people trying martingale and claiming to be profitable in the short term, but those are ways to gamble which can easily drain one's bankroll in minutes of one is not careful...