A couple thoughts from my NYS backpacking trips. Redundancy - two is one, one is none. Extra glasses, extra glove, extra strin, multiple ways to start fire - vasaline cotton balls, char cloth, matches, ferno rod, a few lighters. Other considerations: duct tape, cordage, emergency whitle - wear around neck, marking tape. If you are going out in warm weather don't count on springs or smaller water sources. Carry some type or 2 of water perification- iodine piles, filter, boil water. Signal mirror, space blanket, a small foam pad to kneel or sit on. Water is the heaviest thing you will carry- use Guatoraide bottles - lighter then nalgine. High fat / high calorie foods, jute cord - can make a birds nest for starting a fire. Small piece of aluminum foil to put on ground if wet to build fire on. Alcohol wipes - first aid and used as a emergency fire starter. Neck knife - always on your person.
I keep a whistle, neck knife, lighter vasiline balls in my person at all times. Just some quick thinking.