Cost Plus might be one of my favorite stores. Their prices are amazing and the selection is ever-changing. They have great deals on stemware (a lovely place to stock up before a party) and they carry everything you can imagine.
They generally have a large seasonal selection which goes on deep discount after the particular holiday has passed. It's not rare to get up to 75% off!
My husband and I were at Cost Plus last weekend and got a great mini BBQ for only $24.99. I'm telling you, you never know what you'll find, and that's all the fun!