Pry an edge of the sticker off the surface by wedging something sharp and thin between the sticker and the surface, such as a razor, knife or fingernail. Sometimes this is the most difficult part of the process. If you are unable to pry the sticker from the surface, skip to Step 3.
Grab the edges of the sticker and pull them out away from the attached surface until the entire sticker is removed. Pull the edges close to the surface over and across the face of the sticker for best results.
Place a hot, wet washcloth over the sticker if pulling is futile or some of the sticker paper remains on the surface. This saturates the remaining paper of the sticker so it can be scraped off with your nails or a sharp edge.
Cover the residue with baby oil for an hour if the sticker was on glass. Wipe the surface down with a dry cloth to complete the removal.
Wipe the surface with naphtha -- a volatile liquid hydrocarbon mixture -- or a bit of rubbing alcohol, if the surface is covered with a paint or finish that you do not wish to damage such as on a guitar or hardwood floors.