I read a whole bunch of books on homeschooling last year; in fact, I just went to the library, typed "homeschool*" into the search engine there, and over a period of about two months pulled every single book on the subject off the shelves and read it, from "Teach Your Baby to Read" (Glenn Doman; I wouldn't recommend this one, a bit of a waste of time IMHO) to "Teach Your Own" (John Holt; definately worth reading even if you're not planning to unschool) to "The Well-Trained Mind" (Jessie Wise & Susan Wise Bauer; this is the program which I'm doing with my niece. The attitude is a little bit... snobby... but the program is, overall, an excellent one with many strengths). I read books about the practical aspects of homeschooling, as well as about methodologies. There was a book full of free resources for homeschoolers which is excellent but I can't remember what it was called.
I also did a lot of reading on the internet. At the top of this forum is a sticky list of resources for homeschoolers, and many of those pages have links to more information.
I have to say that of all the things I read, the absolute most important was a copy of the laws in my state. I live in PA, and there are *loads* of laws here which homeschoolers must abide by. It looks like a real PITA, but it's really much easier than it looks! You definately want a thorough understanding of the laws in your state before you begin. I was planning to do a test run this year with regards to record keeping, but because my niece was pulled out of school she gets to be the guinea pig.

She's actually doing really well, and the record keeping is a heck of a lot easier than the law leads most people to believe.

Then of course, there's this forum: if you have questions, someone here is bound to have asked before and someone is bound to have answered. It's like having experts on every sort of curriculum you can imagine, and most of the state laws, right on your desk.

When it comes to the every day, nitty gritty stuff, this is the place to ask.
Homeschooling is great fun; I find it to be very rewarding not only for my niece and son, but for myself.

It's such a satisfying experience to see a child not only learn, but enjoy learning and know that you played a role in that.

(Sounds hokey, I know, but I still get such a kick out of watching my niece and son learn new things!) Kids are truly amazing people, and I wouldn't give up homeschooling for the world. Best of luck on your journey!