7. "Hypermile" for better fuel economy

We're never going to recommend shutting down your engine and riding a tractor-trailer's draft, but you can learn a thing or two from the folks who take their gas mileage very, very seriously. Here are a few tips gleaned from Wise Bread's take on hypermiling:
Track your mileage: You can't tell if your efficiency efforts are working unless you're keeping track. Try resetting the odometer every time you refill your tank, rather than trying to note and guess mileages individually.
Leave lots of space ahead of you: It not only shows you paid attention during driving lessons, it gives you more time to gradually slow down instead of slamming on your brakes and losing all your momentum.
Use cruise control more often: Accelerate gradually over a distance and you save on all the gas eaten up by lead-footed acceleration