If you are new to sports betting, dont rush, make for the fist bet a small just for fun.
If you are fan of multiply sports and racing it is better to devide your deposit to different events.
Also on the net there a some sport betting forecast websites. You can use them for a fee.
Keep to rise your bet game after game, you will get to know better the process of sports betting: - where is game is playing at Home or not, - who have an injuries, - the winning steak of a team and other aspects.