In normal, day-to-day use, I put the hand brake on and then I put it in gear (first or reverse).
After that, I depress the clutch so that there is no unneeded load on the trans while it's sitting there, but it will hold the car back if the parking brake fails.
In our family, the use of parking brakes (or "E-brakes" as we say here in NJ), has often been point of dispute.
I maintain that if you use the parking brake, the cable will keep getting "cycled" on and off and will not stick. Others, like my Dad and few of my brothers like to "save" their parking brakes. But I notice that my parking brakes works smoother and more reliably than in their cars.
And there is a viewpoint by some that you will wear out the return springs in the rear brakes if you use the parking brakes. But the motion of the rear brakes springs is much less than the distance required to reach the permanant "yield point", so that is unlikely.
If I park a car "long term", I use wheel chocks and leave it in gear with hand brake off, since the brake-friction surfaces may rust together.
I don't worry about sharing: no one else *wants* to drive my cars. /bcforum/images/%%GRAEMLIN_URL%%/jester.gif