Potty Training???

I'm kind of, sort of, thinking about the whole "potty training" thing with Brooks. He's recently been going teetee on the potty (only because he knows he gets a treat if he does), and tonight he went poop on the potty! Birdie sent him some underwear to get him excited about it and tonight was the first night he tried some on. He had them on for about an hour, but he didn't really stay dry. I guess we're just practicing. I'd really like to have him potty trained though. Any helpful advice, books to read, websites, etc?! Because I have NO IDEA what I'm doing.
Brooks showing off his muscles:

The airplane on Brooks' head is really an Easter basket, but Brooks enjoys wearing it as a hat: