Writing

you can pay someone like me to do it: http://www.dvorkin.com/ebookpubhelp.html

But if you have any computer skills at all, it's really not that hard. My clients tend to be people who don't want to bother with those details or simply don't have the skills. I also have a corporate client; don't ask me why they haven't hired someone to handle it in-house, but I'm glad they didn't.

As someone else said, though, don't expect to make money at it. Very, very few self-publishers do.