I am fully intending to mail some postcards through the Post Office system (legally, of course), but am having trouble bringing down my audience. I thought about just blindly sending out 100 postcards, just to get the word out about my product, but... that seems almost like a complete waste. Is there someplace that I can get a free mailing list of maybe book club addresses, or college students in literature addresses, etc. If I can focus my audience, then the odds are more likely that I will actually sell a few of my products.