Hey welcome to the forum Buffalohump,

I agree with cajun that you should have the basic essentials in your pockets redundant with your backpack. Some situations may leave you without your pack. Most of the essentials have been outlined already. Making a minimal rain resistant shelter (plastic 50 gallon drum/barrel liners), Purifying water (tabs or iodine + container), making fire (magnesium block + striker), orienteering (compass), signaling (mirror) and basic first aid.

Cheers and good luck,