I think it's best for you to find out what you enjoy writing about and what gets the best response from readers. There's no one thing to write about - on Bleacher Report most writers bring different things to the table like a statistical outlook, humor, rankings, blog pieces and news pieces.
As far as topics, just try to find something both time-relevant and interesting. For example, don't simply write about the Bulls beating the Knicks, write about why it happened and how the Knicks can improve moving forward.
In college now huh... cool