Most clearance sales aren't advertised, and the clearance items are often stuck in some corner. So, to really find the good stuff, you have to go looking in the aisles. However, you will be rewarded. The exception to this is clothing. Clothing clearance racks are usually out in the open, with a easily noticed sign advertising its presence.
Clearance sales are most useful for buying gifts, as the merchandise is new.
For savings on home appliances, and other higher priced items, check out a store's Scratch and Dent Room. It's only fault was that it had no boxes, and got a little dusty from sitting around. Also keep an eye open for places that are going out of business. There are a few things you can do to save food costs. When buying bread, and other bakery products, look for the day old stuff.