A few years ago, someone on Ubuntu forums introduced to me the concept of affiliate marketing, back then I was an Ubuntu newbie who didn't really know anything about affiliate marketing or Ubuntu for that matter.
Fast forward to today and I still don't know that much about Ubuntu, but have at least made my first affiliate sale from Amazon.
The book that I sold was one that had a very powerful message that I haven't even read. In all honesty, I don't even have a clue on which particular post I put the affiliate link in, since I've been using Amazon Associates sometimes as a free picture repository where I use the pictures of products that are for sale rather than just get from images the Internet.
I find it heartening that the first item that I ever sold online is a book of encouragement and about winning. Who dares wins, I like the sound of that. :) To whoever bought the book from me, thank you!