If you ride the red/some orange metro buses to work...

make sure you pay attention to the tv's on them. they have little trivia and quizzes and brain teasers. if you are able to solve them you can email the answers to them (they give you the email depending on which game you are playing). then if you get the answer right, you get entered into a raffle to win free tickets to stuff (mostly movies, but hey LA theaters are expensive).