Billy has good advice,
But please let me add that up until I bought my HCH in Jan '04 I was among the worst for speed and extremely agressive driving.

Right away I learned the efficiency potential of this car and decided to maximize it.

No matter what you drive, high speed/agressive driving = poor MPG.

It may seem at first that driving for efficiency takes a much longer time to get there, but even the extreme measures I take I'm looking at about 10 extra minutes over 46 miles. That's including traffic, stop signs & lights and 5:00 Atlanta traffic.

Efficient drivers do it better.
1003 miles a tank personal record. 74MPG calculated. HCH1 CVT