Leave the car in gear , or with chocks if it is not being used.
Excellent advice from Andy as always, but this bit always amuses me when I see it. It's standard advice, I see it a lot, but I do find myself wondering just how many Morgans are kept in garages with sloping floors? All our cars just sit in the garage in neutral with the handbrake off, I've never noticed them rolling anywhere
Obvs for those that have to live outside parked on a hill, it's different kettle of poissons. In gear with the front wheels pointing downhill and turned towards the kerb would get my vote.
