I taught escape, evasion and survival techniques in the military.

Never carry "just in case" or comfort items.

People tend to think they'll need all these things they couldn't carry across the street let alone for miles in the wilderness.

My jump bag has a pocket knife, a fixed blade knife and a very good hatchet.

Two methods of starting a fire.

An ultralight pan for cooking.

Collapsible water container.

Small survival fishing kit, cord and wire for setting small animal traps.

I don't ever unpack anything I'm not using and everything is always within an arms reach in case I need to move out quickly.

In all seriousness you need to know how to use a few simple tools to survive instead of carrying more things with you.