There are two NaNo-similar events that we as RPG enthusiasts can participate in--either one of which will increase our creativity and productivity, ending with something substantial of use to the RPG-playing community.
National Blog Posting Month, AKA "NaBloPoMo," is not held on a regular schedule like other "National Blah-blah Month." Rather, bloggers are encouraged to pick one month of the year and, during that time, post something each and every day. Bloggers from throughout the blogosphere with a wide variety of interests commit to posting something substantial on a daily basis for 30-31 days (or 28 days if you're a February slacker). In December, I challenge all RPG bloggers to commit to a daily post throughout the month. To make this useful for your readers though, I suggest that all entries have some kind of use to the RPG community, ie, new monsters, characters, rules, etc. Or if you'd rather create something more substantial...
National Game Design Month, AKA "NaGa DeMon," was founded by Nathan Russell of Peril Planet. His challenge is for you to create a game within 30 days, whether it's an RPG, boardgame, computer game, or other project. You "win" by actually creating and playing your game within the month. Now, NaGa DeMon is being held in November 2010 (in other words, it's currently underway) and so it collides with NaNo. (Nathan has suggested he may run the next event in February 2011.) Anyway, I plan to tackle NaGa DeMon in December, wrapping up 2010 with one (or two!) RPG projects I've been dragging my feet on. If interested in this challenge, why not try to finally hammer out that rules supplement for your favorite system? Maybe you have an adventure module you'd like to write, produce, and publish. Maybe you'll just come up with that ultimate RPG rule set and, once complete, release it for free to the world. The object is to finally put pen to paper and create that RPG game or supplement you've always planned on writing. (And really, a name like "Naga Demon" just SCREAMS for RPG involvement!)
Anyway, those are the challenges for December. You have two weeks from today to get planning on which you'd like to tackle. I'd really like to see an explosion of blog posts and/or multiple RPG projects coming to fruition during the month. Chime in if you plan on taking up the Gauntlet of either one! And watch for updates throughout the month as to my personal progress on my projects.