Since a few readers have expressed an interest in writing and selling e-books recently, here's a free course on e-book marketing you may be interested in:
The course is an eight-part opt-in email course, offered by Writer2Writer.com.
As I mentioned in a previous post, I royally screwed up the marketing of my first e-book and learned a lot from the process. If you're considering writing an e-book, don't make the mistakes I made. Learn as much as you can about e-book marketing up front.