Check the red Sale tab at the top of Lumber Liquidators' homepage to find hardwood flooring at clearance prices.
Handlesets.com is part of a much larger network of online hardware resources called Build.com, which you can access all with one account. It's like heading into a super sized Home Depot or Lowe's and getting everything you need for the home at the lowest possible prices without ever actually needing to leave your home.
Harbor Freight Tools generally has a discount code good for 20% off any one item throughout the site all the time. On special occasions and holidays, they often release short term 25% off codes as well.
You can get free shipping on all orders over $49 from Build.com. Orders under $49 ship for $5.99.
The best way to save is to sign up for the Lowes Moving Center. You can also stop by your local post office for a change of address packet. These will often have a 10%-off coupon for any in-store transaction, with a maximum discount of $500. (Don't worry if you're not really changing your address: your secret is safe with us.)