Bet management is the important factor here, timing and lots of patience.
Slot is more on luck and if you know how t control yourself, you can go out with a decent profit, but if you are greed
there's nothing but losing your money.
Keep in mind that the strategy is on how you manage your time and how you will balance your bankroll. Gambling is
entertaining if you know how to find the enjoying part of it.
Considering how you will most likely lose all of your money in all of the types of gambling, there is no smart way to gamble. Sure, there are some methods where you would be able to gamble a lot longer, like say if you wager 10 cents and have 100 bucks, on a slot game, then you will gamble a lot longer, or if you wager all of the 100 dollars into a dice game with 1% chance to win, then you will most likely end up losing after one bet.
This is why I agree that some gamble for longer, but everyone ends up with a loss in the long term due to house edge. There is mathematically zero chance for anyone to keep on gambling and winning in the long run.