Hard to go wrong with a Corolla.
I had a 95, and with no hypermiling at all, I usually ran it about 80 MPH down the interstate, cruise set with the ac on, and average 41 mpg. Never really tracked my in town mileage but I'm sure it was in excess of 30.
As has been stated, neutral is your friend, coast to stops in neutral, coast downhill in neutral.
What I haven't heard said is weight reduction: Not a lot of weight to shed in a small car like a Corolla but I'm sure there's some.
__________________
|