I know there's been a lot on the news about hypermiling, and I won't go into it here, but I decided to give it a little bit of a try.
Basically what I did was went exactly the speed limit, tried to slow down and accelerate more gradually.
Honestly I expected to see a MINOR increase, but the results really surprised me.
After two fill-ups I've gone from 19 mpg, to 24 mpg which is a significant jump. I'm pleasantly surprised by the results, and I'm definitely going to continue it. This adds up to an extra 60-70 miles per tank of gas.