I'm wondering what others do to stop their kit freezing in extended cold hangs?

Do you keep things in the hammock next to your body heat?
How do you avoid kit rolling into the bottom of the hammock at night?
Electronics are obviously easy to keep warm in a pocket but what about big things like spare boot liners/damp boots etc?
Do you use a hot water bottle (Nalgene) to keep stuff thawed instead?

Whats your strategy?