In one of my favorite episodes of 'Seinfeld,' Jerry and George discuss the "pop-in." Jerry says that even though George likes the "pop-in" he hates the "pop-in," and I couldn't agree more. I hate the "pop-in."

This is when a guest comes unannounced and just "pops in" for a visit.

In our age of mobile phones glued to our ears, there's absolutely no reason to ever pop in on someone unannounced. Just call ahead. Or send a text. Or post a note on Facebook or Twitter. Some kind of heads up.

Don't just "pop-in." That's rude.