HD Blade - best way to secure it upright?

I am impressed with my recently-purchased HD-Blade but want to know how to keep it securely positioned upright. If the best reception spot in my house is not taped to a wall or window, is there some sort of desk accessory to keep it in an upright position?

If I do end up sticking it to a wall or window, whats the best way to keep it from falling down without damaging the window or paint when it has to be removed?