My Coke Rewards offers 10 My Coke Rewards Points for free by clicking "Tweet & Earn 10 MCR Points". (You must be logged into your MCR account to receive them. Not a member? It's free to join. Having a Twitter account isn't necessary.) That's among the best general-use free-point codes we've seen from My Coke Rewards. (We saw 20 points total last week.)
If you haven't already, you can get at least 10 more My Coke Rewards Points by clicking here, then clicking "Share" and tweeting something.