Step 1: Conserve your gasoline
Step 2: Carpooling
Also this helps the environment...
Step 3: Ride a bike
Here is a Formula that you can use to see how much money you can save:
$3.15(Price of gas) x 2(how many times a month you ride a bike)
x 1(how much gas it takes to get to and from work)= $6.30(savings)