The old boy scout adage of "Be Prepared" always worked for me. Extra socks, dry matches, snake bite kit, survival knife/camping knife, water purification tablets, bandages/first aid kit, length of rope, wire wood saw, compass, small tarp/lean to, blanket, mirror/reflective device, assorted nails and a small hammer/hatchet, a portable container of dry wood tender, extra shoe laces, chalk, sealable plastic bags (also good for sucking chest wounds when you trip on that rock and fall on a branch). I'm not talking a gigantic collection of any of this stuff but yet enough to make you feel like your good to go. I once had a backpack ready to go at a moment's notice where I felt confident that I could survive almost any regional environmental extreme for an extended period.
