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The correct thing to do is keeping expectations low and accepting that whatever the outcome of the session is, it will have nothing to do with anything but pure luck.
Luck is also based on the type of game chosen, If you continue to play Slots and you only get a loss then you really haven't been lucky and the system hasn't given it to you,
But there will still be a chance to be able to win if the gambling is indeed Legit and actually gives the player a win.
Slot games totally depends on luck and not skill but in sport betting, a gambler can expect that their skill in make good predictions can help them to always make winning. Although, in general I think that gambler should just prepare their mind for what ever result that they get from they bet because it's a game of uncertainty.