I remember somebody posted a site that showed a multitude of different ways of setting up a tarp, but I can't remember who it was or what the site was called. Give it a while and somebody will be able to tell you!!
My setups depend on the area I am in. If there is a dry stone wall, I may consider a lean-to in nice weather. If it's howling, I'll pitch it low, not as low as yours, but not much higher either. I would stick my bergen at the bottom end if it's not that bad but at the entrance if it is really bad to try and stop the wind getting in. The next time I get the opportunity, I intend to set it up with a corner at the foot end and the two edges fixed to the floor, then the opposite corner to the foot attatched to a tree, just to see what happens!!.