If possible, try to anticipate the driving conditions that you will be taking on your route. If you know the traffic is heavy on a certain road, try to take an alternate route. This also applies to driving conditions that may cause you to tailgate or practice some other inefficient driving procedures.
The cleaner and smoother that your driving is the more fuel costs you will save. Take the time to plan your driving routes accordingly. You’ll find that in the long run you’re saving yourself frustration as well as money.