Interesting blog post from the author of Evernote Essentials.
His best tip:
If I had to attribute my success to one single thing, I wouldn’t hesitate to say that it was the affiliate program. When other people who really believe in what you sell are given the opportunity to make some cheddar while they share your wares, everybody wins. This arrangement has brought me countless customers that would have never heard of me or my stuff without the recommendations of my affiliates.
Read the rest of what he learned here: 10,000 Sales Later: Lessons Learned from Selling Evernote Essentials | Bridging the Nerd Gap.