One trick I have learned is with ACC off, pushing the mode button will allow air flow through the vents but the fan will not run. Push the mode button repeatedly to change which vents open. On a cool day, this maneuver is enough to keep some fresh air in the car without using any extra power. I don't know if the manual describes this maneuver.
One trick I will never do again is to brake just enough on a steep downhill to engage autostop, but let the car keep rolling and pick up speed to ~ 15 mph. Riding my brakes yes, I know, not smart, but there is more. This trick completely confused the transmission, and when traffic started moving again MY CAR WOULD NOT. I had to turn the engine off then back on again to get the car going. Do not do this. Yes I can be pretty stoopid sometimes.
Another trick I am sorry I tried is adjusting the windshield washer nozzles. They can be adjusted, with a small screwdriver, but if you can improve upon their original positions you are more skilled than I am. Ever since I tried to adjust them, they are worse off, and I can't them back to the way they were.