Check out Walmart Sales during Memorial Day weekend. They have some of the best deals of any online stores. Check out their sales on electronics, clothing, home decor, jewelry, beauty, and outdoor items. You will find Memorial Day deals of up to 60% off in some cases. If you are interested in appliances or tools, you will want to check out the Sears or Home Depot sale.
For pretty much everything else I think Walmart is the way to go. There are also some great deals on Shipping as well. As there will be some Free Shipping and some shipping for under $1. If you want totally Free Shipping you can order online and pick up in your local store. To see all Memorial Day Deals at Walmart, check out Walmart.com.