Email Facts of Life( Last modified: Jun 22, 2005 - 11:20:09 AM ) Debunks a number of Urban Legends and teaches good Email etiquette. I didn't originally write this, but I have edited it quite a bit. If you revise it I would like a copy of the new version.
HTML Hell Eric S. Raymond covers the annoying things seen on too many web sites. Also see Jamie Zawinski's version, "design."