Wood pallets as fencing - Set them up nicely and add a dash of paint. This could work. (Its not exactly furniture, but seeing as all my other furniture so far is made from either pallets or crates, I thought it fit in well)
Learn how to make a strawberry planter out of a single wooden pallet. Plant the top and the spaces along the sides with strawberries to maximize your harvest - this is a fairly easy construction project and once you've made one you'll want to make more!