Some semi-organized snail mail campaigns

I'm not under the impression that any of these have picked up much steam as of yet, but, well, there's one way to do that.

The Majority Project: 1M Postcards to Congress

Just Passing Along | Project Mail Storm

Postcards to SCOTUS and Congress

And, of course, if you need some ideas of what to complain about, you can start here. There's also no law stopping you from sending mail and making a phone call.