....and always park the car with first gear engaged, so that when the inevitable happens and the handbrake does fail....
AAAARGH! No! Please don't adopt that annoying habit, which seems to be so common amongst garage employees and people who knock around cars. I always declutch when starting the engine but when you're in an unfamiliar car it can sometimes be difficult to know whether the gearbox is in gear or not, meaning you have to lift the clutch slowly for fear of stalling the engine. If somebody has left it in gear and you forget to declutch, the car can jump when you start it, which is really annoying as well as dangerous and damaging to the car.
If you must do anything to protect against handbrake failure, leave the wheel turned so that if the car does roll the front wheels will come up against the kerb.