Stifling creativity creatively

So, I'm in this mood to be creative.  But... how?

I have this annoying self-awareness thing going on.  I know what I'm capable of.  I know what I suck at.  Add in a nice dash of being overly self-critical with a splash of self-deprecation, and you got, well, me.  I could try writing, but I'm not confident enough in my writing to be comfortable with posting it as an attempt at being creative.  Maybe funny, sarcastic, or just plain rude and angry, but not creative.  There's my music, but I don't play well enough to really do anything with it.  I doodle more than draw, I don't paint, I don't sculpt, I don't carve.

So what's a guy to do when he feels like he wants to make an impact bigger than a footprint in the mud?