I think that's what we are trying to figure out here: how we place value on the matches we select, and what are those things we see on those clubs and teams that make us place a bet on them with the particular option we place a bet on them with?
The answer is "research." You'll understand it and learn from experience if you're consistently betting on sports. We're talking about clubs and teams, so we should stick to one league to familiarize ourselves with the teams well, which would give us an edge in the long run if we develop a strategy that helps us spot value. Being successful in this doesn't mean we win every time. Our goal is to win most of the time with a winning percentage that guarantees profit. Along with that, we should also consider the most important strategy: good bankroll management.