You need pallets, wire (to bind them together), some simple tools, and any extra hardware you would like to add for ease of use.
Step 1: Getting it together...The lay out.
We don't have a slanted base in this design. Simple is easier. We're going with 3 sides and a door.
Choose your lay out. I don't need a huge bin, so I opted to stand the sides up to narrow the bins depth. Plus, it gives me a 2x4 side to attach my hinges to.
Step 2: Piecing it together.
Start with cutting the wire to a workable length, roughly 18", and strap the side and back pallets together by twisting the wire tight. Be careful not to over do it. Too much tension and the wire will break. Two lengths twisted on each corner should be plenty.