I think you've hit the nail on the head. A warm, water proof/resistant jacket would be top of the list. Followed by a tea kit. Then probably the knife.

The lists are mostly about doing something. Cutting, burning, navigating, signalling. The first thing you want to be able to do though is stop and S.T.O.P. Don't start building shelters or burning down forests, or heading where you think things should be. Stop and evaluate your situation.