What problem are you trying to solve ? (a good video about innovation)
Here's a good video about innovation. It's a speech by Scott Berkun at Web 2.0 Expo in 2008. Berkun gives a 10 minutes speech about innovation (post-it, Edison, ...) and finish by this very good idea : the most important question to answer by innovators to be successfull is
**" What problem are you trying to solve". **
This is especially true for social media !