Great question — answering as the UphillTech team:
As usual, skills are the lightest and most effective thing one can carry. From how to bushcraft useful things from natural materials, to clever ways to satisfy needs like signaling or navigation, to keeping a healthy state of mind. Nonetheless, some useful items greatly increase chance of success / reduce chance of suffering. The less skills, the more reliance shifts to items. Because items aren't always reliable, can weigh down a hike, and sometimes call for special skills anyway, much better to start with skills! Now onto the items, a kit I've carried in very remote, very cold woods through good and bad: Think in terms of elements, and in terms of marginal benefit. For example, carrying...
Full answer by cr0: https://outdoors.stackexchange.com/a/21259 (CC BY-SA 4.0).
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