Best gambling strategy(My favorite):
1. Gamble with money that you are willing to lose. Play primarily for the fun aspect and enjoy.
2. Go all in and leave. Don't focus on playing the long term since the HE will ensure that the casino ALWAYS wins in the long term.
3. Trying various progression strategies could help in the short term, but yolo gambling(All in at once) is the most effective option in the short term in my opinion.
4. Use the same strategy in sports betting too.
I suggest not playing for a long time, it is true that by the end of the day the house always wins. It is either you earn some or lose your money in the long-term, take note that in every bet you need to pay a certain fee every time you win. Never too much thought on gambling, just play for fun and don't make it as a way to earn money.