I wished I could clone myself

A long time ago (in this galaxy, not one far, far away) I had a successful online course. I taught people how to take their digital SLR cameras out of auto mode and leverage more of the settings to take better pictures. The course wasn't a series of video lessons or anything fancy like that. It was a PDF guide. A long one, mind you, but just a PDF guide. I sold the guide to people who visited my website and blog. If someone purchased the guide, I'd answer their specific questions about their...