Bet only to the games that you know. Sometimes it's okay to bet with those games that you don't know but do it for fun and don't bet with amounts that you can't afford to lose.

Sports that you understand is going to give you the edge and that's why I am telling you to bet only to those that you know.

Otherwise, it is a gamble already and you don't have to gamble with sports that you don't know so, it's best to stick with that strategy.