If you have a plastic medicine bottle that needs its label removed, fill it with almost boiling water. Let it sit 20 or 30 seconds so the heat can soften the label's adhesive.
You should be able to peel it off easily by starting at one corner and work your way around the bottle.
If you're tired of lint and hair clinging to the sides of your duct/gorilla/aluminum/packing tape because you don't want lint/hair stuck to the things you tape, then there's a simple solution:
Baby Powder (Corn Starch, Baking Soda, etc) on the edges right after you remove the shrink wrap when you first get it. No more sticky edges, no more hair on your packaging.