Does anyone have any suggestions for cold weather observation techniques?

In general, about anything one might wear for ice fishing. Wind resistant head
gear, layers of clothing top and bottom, and insulated soled boots. The advice
about a warm head (keeps feet and fingers warm) is true in my experience.
Consider a hood.
There are various ultra thin glove liners available at army surplus stores.
These can work well with ep's, focuser, notes and atlases. Better than bare
hands at the scope, but not as warm as heavy mittens obviously.

john