Here are some of my favorite blogs: someone mentioned Elana's Pantry - love her site because all her recipes are easy and don't require a lot of ingredients (she does usually only use one flour). Www.Lillianstestkitchen.com has fun cooking videos. I also love www.chocolatecoveredkatie.com. It's not strictly gluten free but most of her recipes have the adjustments listed. Couple others: www.realsustenance.com, www.paleomg.com, and www.detoxinista.com, www.spunkycoconut.com.
Like others have said, I really like Pamela's baking mixes. I used one in my bread machine today and it came out amazing. Also use her muffin mix a lot. I get them in bulk from Amazon.
For cookbooks, I use all of Elana's Pantry a lot. I also really like Paleo Indulgences.