Use the vents to stay cool. The AC draws less than the loss from putting the windows down. Use the coast down When possible use the coast down feature instead of the brakes. The coast down puts more back into the batteries than the brakes since no friction braking takes place when using the coast down. I usually drive without the coast down button pushed in and then push it in when I want to slow down.
Experiment Try different techniques and see how they work.
You will need something to give you feedback for small differences in driving patterns. My EV1 Dash program and hardware hookup will do the trick or else you can write your own data collection software. On the numeric display keep an eye on the net amp hours used and compare that to the drain. The closer those number are the better you are driving. If you keep a constant 25 Amps the number should match exactly.