I heartily recommend reading "The MORE Complete Chondro" by Greg Maxwell if you're serious about getting a GTP. I know it's pricey for a book, but if you really want a GTP, $50 is a drop in the bucket.
I forgot to recommend that!! Thanks for remembering! Yes, that's an awesome book. It was hard for me to spent the $50 but when I got it, I read it cover to cover and it is sooo worth it! GTP Bible!