We've all heard of the guy who bet on the underdog team within the Superbowl and walked away with thousands of dollars, or the friend of a friend who knows a guy that can hook you up with a Filipino cock fight next weekend.

If you're a sports fan, it's a pretty safe assumption to say you know that betting, both legal and illegal, takes place on practically every professional game and lots of college games.

Simply placing a bet may be a confusing affair -- sports books have their own lingo, online soccer gamble (This Internet site) and also the systems vary. Figuring out how to bet good enough to make some money is another matter entirely. How are the odds determined? Who sets the line? What portion of the time do you'll need to win to break even?