Self-publishing belongs firmly at the top of any passive income ideas list. Amazon, with Kindle Direct Publishing (electronic version) and CreateSpace (print on demand version) dominates the self-publishing world. It’s both good and bad. Good in that they’re quite generous with their commission rates (usually 70%). Bad in that they can change their policies at any time to be less favourable for authors and there is nowhere else for us to go. That’s not entirely true. There are a few other options, but none of them are as good as Amazon!