In general, I am not all that into sporting events. Lately, I've been trying to understand sports in general. One method, is to get a jersey for the team I'm cheering for. Not only does this give me something to wear, but can also greatly improve the odds that I cheer at the right time.
I have also participated in several pools. I'm the fish. They get me to play to increase the amount of money that actual fans will win. I generally prefer to choose my teams based on which mascot would will in an Arena fight, although I make exceptions for particularly cute mascots, such as the little turtles I chose to win March Madness.
So far, I've already lost two of my teams, but I didn't have any of them moving on, so we'll see how it goes!