Gasoline prices keep falling, with the national average settling at $2.55 today, down four cents from yesterday. Yesterday, I visited my local gas station and pre-paid my gas guy (he's there every time I pay for gas) $25. My tank would only take $23.50, so I just decided to just tip the gas guy. It's probably the first time he's received tips in the last 16 months. Yes, it took an economic crisis for gas to get this low. It took people exchanging their Hummers for hybrids. It took moms combining shopping errands into one trip instead of going out three times a day. It took daddies deciding to carpool with coworkers. But gas is once again low. But how long will these lifestyle changes last? As long as it's still somewhat taboo to drive a gas-guzzler, or until the next hip gas-guzzler is introduced? Or are these low gas prices brought to you in part by the fact that the election is five days away? That's another blog altogether...