Tip #1: Check the ad carefully to see when the sale starts. Two years ago, the Michaels ad came out and they had a special 3 hour sale on Thanksgiving Night. Cricut cartridges were as low as $15 a piece when you bought five.
Tip #2: Layaway. Get the leaked ads - place the item on layaway, with a price match guarantee. Get a signed and dated copy of the price match guarantee from a store employee. I do this regularly. I go in two weeks ahead (when I normally see the Black Friday pricing), put my 10% down, and get a signed price match guarantee. Friday afternoon, I go into the store (with the remaining payment) and pay the Black Friday price.
Tip #3: Spread Out. If you insist on getting up for door buster sales, get a group together and split up. Hit multiple stores to see who can get the door buster price. You have a better chance of getting the deal when you hit stores that are outside of city limits.
Tip #4: Shop online on Thursday. Most stores turn on a special Thursday price when you order online. So, around 9pm, start looking!
Tip #5: Don't be brand picky. If you come across a great deal and the brand you want is out of stock, ask for a manager and then ask if you can get a comparable deal on a comparable product. Example: the TV you want is 30% off regular price and they are out. Find a similar TV (as close as possible in specs/size/etc) and ask for 30% off regular price on that TV. Most stores will adjust, as long as you ask!