I, you and most of the gamblers out there will probably admit that no gambling strategy will work in their favor in the long run. But it looks natural when we are very curious about strategies that can increase our chances of winning. I totally understand why you guys don't recommend many strategies to me and that's because no single strategy can guarantee a win for gamblers unless they are lucky enough.
I mentioned poker previously as the only game where it is possible to use a long term strategy, but there must be other games out there which can create a long term winning strategy around. Blackjack is often beaten by using some simple rules and counting cards where possible, but again you are fighting the house in order to earn the small edge where profits come from. If you're able to count cards then you can time your bets to where it can be profitable (over many tens of thousands of plays), however it is fairly easy to identify this strategy by the casino and many "professionals" end up getting blacklisted because they use these strategies. So even if you find a winning idea that is totally legal, if it is easily detectable then the other party seeking profit will not allow it.