Walgreens is running a free 8x10 promo with in-store pick-up. I always take advantage of this offer. I love using it to get 8x10's of my adventure.
Go to: http://photo2.walgreens.com/walgreens/home
After you upload your picture enter the code "BIGPICFREE" which will subtract $3.99 from your total.
You will need to select in-store pick-up to make it completely free.