You can actually get free items out of the clearance section. If you select items that are 2 for x.xx, they will still discount you as if they were full price when you go to pay. If the clearance price is less than the discount, you will actually end up with a negative balance. This will discount from the other items you have bought. If you time it right, when the new clearance items are out, you can actually get a significant discount on your bill, and all the clearance items are free.
I've been doing this for a good couple of months, but I thought it was time to share the trick. I made a video of me doing it, so that nobody can say it is not true. The checkout is all computer based, which in this case is not a good idea.
http://youtu.be/dvGbg__CKN4