The Federal Trade Commission just made it illegal for telemarketers to call your home. All you have to do is enter your phone number in a database. Here's the story:

Anti-Telemarketing

Or you can go to the website and enter your phone number:
Sign up

I don't know about you guys, but I get 2 or 3 calls every night. If I can file suit for $11,000 per call, I'll pay off my boat before Christmas!