Whether you're a die-hard hoops head, a casual or someone who's never watched a college basketball game, there's a decent chance you've been invited to fill out a bracket. Here's what you need to know.

But we aren't so far away from our college years to remember what it feels like needing to cram and we've got you covered with plenty of Region previews — West, South, East and Midwest — plus the favorites like Cinderellas,