#4 Maintain a betting record
As crazy as this might sound, it's really important to record all of your bets. This means make sure you know who you bet on, what odds you bet at, how much money you bet on it, and the result of the game. Not only will this help you know when you are up or not, which will be insanely helpful when under pressure, it also helps reflect what betting strategies are working and what aren't. Be disciplined.
