Don't play those games where your chance's of winning is very low.I always avoid roulette,slots and keno because these game depends on luck mostly and house has much advantage.Try blackjack, because it's depends on your skill mostly.
almost all types of gambling depends on luck. except for a few types of games such as poker, It must use strategy. blackjack I think even bigger cheated by home owners. a smart play I think depending on their play, as long as they feel can benefit it better than they always lose in a particular game and continue to impose to play
Along with luck it also depend on experience of the player to gamble. Especially in the sports betting where there is not mostly luck require but the most thing which is required for to bet correctly is the knowledge about the sports. While a person do not have any knowledge about any sport and he will bet on these games then he will definitely totally depend on the luck alone.