I prefer going to off campus bookstores. Off Campus Books in Richardson, TX is a great one. They always have staff to help you and will get you an answer to any question, instead of just saying "I don't know." They were really nice about working with me on my financial aide and told me when to come back to sell my books for the best price.
LOVE LOVE LOVE Jakes. I go there almost every weekend during the summer because its got a great atmosphere and yummy food.