The truth is that one cannot be too sure of which game would be the winning game. What matters is that you are able to manage your risk very well and avoid unnecessary losses.. though losses is inevitable as it's something that every gambler needs to put at the back of their mind. So if you are lucky you might end up with a reasonable amount of win. Sometimes too, what ruins our games is the greedy part of us. We get the chance to cash out but we just say to our self that it's not enough and wait. Eventually we end up losing the game. So it's still just being lucky but even luck varies..
Losses happen too often so that you can forget about them or completely get rid of them. Luck or analysis is only important for those players who are really good in some kind of sport, because they can count on their knowledge, and for everyone else it will only be a game of luck. And in order not to depend on this luck, make only bets on the money that are ready to lose, then this will not affect your mood too much. Even if you are good Bettor, you still need to be able to manage risks.