What is the best way to prevent the window glass from freezing to the door weather strip (at the bottom of the window)?

Mine froze this way the other day and when I opened the door, the window could not drop the 1 inch or so it normally does. I was able to open the door but when I closed the door, the window could not seal properly by running up into the top weather seal, it just closed on the outside of the seal.

While driving the car, the thin coat of ice finally melted enough for me to put the window down a little and back up to seal properly but is there a sure fire way to prevent this freeze?