This works best on the little price label stickers that come on things from the thrift store or smaller mom an pop places that still use old-fashioned price guns. However, it also works well on those pesky department store labels that are designed fall apart into a hundred pieces when you try to remove them.
Step 1: Get some Scotch tape. Take a piece, and while still holding on to a corner of it, place it over the sticker you want to remove. (If you let go of the tape, then you'll have two sticky things to worry about removing.)