Here's how to do it:
For USonians. The rest of the world has to adjust the advice to themselves. There are ways to do this, where ever you live, and "wasting" one day to find out how, calling companies and writing to people is worth it. The Western society uses tons of paper to print this crap, and nature to print, distribute and waste this crap.
Now, if you think it might be good to get the ads and what-nots home, here's
50 things to do with junk mail