The other book is The Bicycle Wheel by Jobst Brandt. It's also good, though as much engineering-theoretical as practical (if you ever wanted to understand all the forces going on in wheels).

Sheldon's site does have a good guide to tensioning and truing on his wheelbuilding page.

I also find that a stand helps a lot, and you can get Performance's house-brand stand for $40 sometimes. Has very definitely been worth my while.