Open The Debates Petition
You can sign this online petition to open the presidential debates to more than just the Reps and Dems. They're hoping to get a million or more signatures to convince the Commission on Presidential Debates, or whatever it's called, to allow more than just two candidates into the debates.
I'm a bit skeptical of online petitions in the first place. This one is really weird in that all they ask for is your name and e-mail address. Not only that, but there's no tally on how many others have signed or any information on who it is that's responsible for the petition. Still, I signed it a few days ago and I haven't noticed any increase in spam so no harm done.