Leave early for work. You never know if traffic has slowed down or will be at a stand still due to an accident or construction.
If traffic is very slow due to one of the above, leave a large distance in front of you. There's no sense in start, stop, start, stop like everyone else does, right on someone's bumper. Keep a low speed to save wear on brakes and save fuel. There will be people who take advantage of space you leave them and cut in. Compensate accordingly by adjusting speed distance.
Drive 55 on the highway, unless the minimum speed is 60.
Don't accelerate hard up hills; take it easy and when you go downhill, you'll get back to speed with less fuel being used. That stated, don't use cruise control in a hilly area.
Limit A/C usage.
On the highway, close windows and allow the fan to be on without A/C if it's not too hot outside.
With manual transmissions, shift early, but don't take too long to get to the speed you want. That also wastes fuel.
See a stop sign or stop light ahead? Coast. Coasting really does save a lot of fuel.
Avoid excessive idling, especially on a cold morning. It's more efficient for the car to warm up for just a few seconds and then start your journey slowly. It's also better on your automatic transmission.
Limit use of accessories.
As always, adhere to scheduled maintenance and DON'T forget about tires and alignments. Also, make sure your brake calipers are properly releasing.
I've had a fair share of motorists who dislike my driving style and activate their high beams, ride my bumper, cut me off, etc. I just ignore it. I had one woman really on my bumper one time, then trying to get around me. Finally gunned it past me, only to pull into McDonald's a 1/4 of a mile down. Apparently, she was very, very hungry.
My average miles per gallon on
http://www.fuelly.com is 40.4 miles per gallon. That's also using the A/C this summer. Today, I earned 41.4 mpg. So, I'm going two weeks on one tank and spending between 70 and 75 dollars on fuel per month. My Corolla is a manual transmission.