I have probably spent too much time in the stores lately to know all this, however if you're looking for some great deals (mostly Christmas-related sales, unless otherwise noted) check out the following:
Target – all Christmas items are 90% off
Walmart – all Christmas items are 75% off
Walgreens – all Christmas items are 75% off
Kohl's – all Christmas items are 80% off. They also have racks and racks and racks of clothing for 60% - 90% off. I got gorgeous maternity shirts at 90% off! Jewelry and shoes are up to 80% off too.
Babies-R-Us – all Christmas items are 50% off lowest ticketed price and all regular clearance items are an additional 30% off the lowest clearance price tag.