Jimmy,
Bring a thermos, camera and lots of patience.
You WILL still wait in a long line getting there at that time but you will probably still get what you want. Those walking in at 9am will be S.O.L. ....if you're looking for big ticket items, TV for example....GO DIRECTLY TO THAT AREA. They may even have them in the middle of the aisles as you enter......grab the BIG $$$ saving items first ..THEN stroll around for the lesser stuff.