One piece of advice is to drive at a reasonable speed. Speeding can be fun, but it’s not exactly fuel efficient (or safe). Gradual acceleration is another way to save fuel, as is switching your car off when it’ll be stationary for more than 30 seconds.
Factors like the weight of your car load and your choice of tires also influence fuel efficiency.
If you’re looking for more ways to keep your fuel usage down, check out how to save $1,347 on gas this year.