Drill bit 1/16 bigger than the toggle bolt anchor diameter.
Drywall where you'll be hanging your items
You will need both parts to make the fastener work properly so be sure to pick up both when you're in the store. They're stored together so it should be easy!
In order to insert into the wall you'll need to
Drill a hole 1/16 larger in diameter than the anchor when the toggles are folded up. Insert the bolt through the shelf bracket (or whatever you'll be hanging), then screw on the toggle so that the wings fold back toward the bolt.
Repeat these steps as many times as you need fasteners!