There are a lot of gambling sites that rely on the skills and techniques for you to win the game, but actually that is what you should prefer to play compared to those gambling sites that only rely to the luck of the gamblers. Aside of playing you are also thinking or analyzing which is really important to maintain and boost the way we think.
Here is the link where you can learn some games that may require skills and techniques to win, and they also listed some ways for you to win:
https://www.gamblingsites.com/blog/100-ways-to-win-at-gambling-16240/100 ways to win does not sound like anything more than yet another clickbait article. Yes some games have a bit more skill than others but for me,,, that is only Poker, and that is only in real life with others at the table to take advantage of their faces, voices, emotions,,, etc.
Even then, you need years of skill and experience to practice. End of the day, most everything is luck. If you find an edge, the casinos take it away.