100% FREE 100% guaranteed gambling strategy 100% no-loss ever:
Don't gamble.
That's it. You'll never have a losing bet if you don't gamble.
I'm definitely going to take this advice after ten years from now when my daughter is fully grown up and she calculated all my losses in gambling for the last 15 years but not right now, while I am still having fun and only allocate a small portion from the income, but this advice should be taken seriously by people who are losing very badly and take gambling as a source of revenue.
Seriously though, you have to take it seriously before it's too late. Well, people have their own choices already it's just up to them which path they have to follow. Overall gambling is still part of the entertainment so consider every entertainment as an addictive one. One should have a strong self control to know when to stop.