Imagine how much time you could get back if you were able to cut out that idle chit-chat that serves absolutely no purpose at all.  I mean, sure it's snowing today in Cheyenne, but that doesn't require a 10-minute conversation about it.

College Humor gives several ways to avoid the small talk.  Here are my two favorites:

Don't Pay Attention to the Weather -- People bring up the weather with a line like, "Boy it's cold out there," hoping that you'll respond and strike up a discussion about the temperature. But if you act aloof like you didn't even notice how cold it is, the conversation will end before it even gets started.

Look Crazy -- No one's going to start a conversation with a crazy person.

These are ones I use on a regular basis!