If you decide to hit the Livermore Walmart on Black Friday, be prepared to stand in line for a long time! I can guarantee you that many, many folks will be lined up at the door by the time they open!
Of all of the Walmarts I've visited, this is one of the best. It's comparatively cleaner and better organized, and stocks a good supply of just about everything you might want - food, cards, DVDs, music, garden items, pet food and supplies, and on and on. The location is also great - just off 580, so definitely easy to access! And the fact that it's across the street from an In N Out Burger doesn't hurt either (if you're a fan of In N Out).
Look for great deals on Black Friday, including early bird specials available only from 5-11AM (for example, a 2-pack of family games for $10), and all-day specials including a Disney Princess Director's Chair for $9.96. If they're offering something on your list, be sure to get there early or you may be out of luck.