Rear Emblem-
Don't use a screw driver, you will scratch the paint. Heat up the emblem with a blow dryer for a few minutes, then use fishing wire or string to get under the adhesive to pry it off. For any leftover adhesive you can easily remove it with Bug and Tar Remover.
This is from a 2005, but here are the official directions:
http://www.hondapartsdeals.com/Honda...emblem_kit.pdf