There is no real easy way because its depending on how much luck you are having on a certain time.
Another thing is the game you are playing I think the easiest game that is more based on tactics is poker itself.
Certainly there is no easy way in gambling itself but even in strategic gambling in poker you can surely need a bit of luck to support your skill in poker, cause even if you can surely can win in poker there will always be one winner in it!
in poker if you playing against the house even you have good skill i'm pretty sure that you will lost and back again this is pure of luck but may be a little different if you enrolling poker tournament offline because skill very necessary to do so