The art of betting on a single sport should be mastered by all gamblers. This sport should always be one in which they can easily gather information and watch. It is not advisable to rely on experts to make predictions, and when a gambler lacks knowledge of a sport but chooses to bet on it, he will most likely rely solely on expert predictions or self-research, which will be based on punters' opinions because he does not watch the sport and thus has no knowledge of the team's strengths.
From experience, there have been times when I bet against expert predictions and won, while the experts' predictions failed. This was only possible since I have proper knowledge of the sport.