Avoid on economizing on 0.0001cents fuel by putting the engine off downhill. That silly stunt might just kill you. In the morning, when you put it on let it run abit.. think of it as warm-up. And always have it washed regularly(not just the outside), blow-dry the engine.. Dust has a way crippling an engine.
Budget for your first accident. I'm yet to come across someone who's never had a scrape. God loves me if my first car, so many years ago, when I was hot blodded(read 180km/hr every opportunity) didn't kill me.