This is by far the best website I have found in quite some time. It's based on "Rules of a Gentleman", but let's be honest, everyone can benefit from it. There are way too many awesome ones to just choose one or two favorites, but #43 is definitely high up there on the list as well as #15, #8, and of course #4 (Hello! Magnum P.I!). I feel these rules should be printed out and obligatorily given to men everywhere (and a few ladies too.) Also, there are only 44 rules total, so abiding by them isn't completely impractical.
Rules of a Gentleman