Water (amount appropriate for outing/weather)

Lunch and extra food

Clothing appropriate for outing/weather

Rain gear

Map and compass

Headlamp or flashlight (extra batteries)

Whistle

Waterproof emergency blanket

First-aid kit

Hiking poles (if you use them)

Work gloves (for work hikes)

Bright clothing (in hunting season)

Snowshoes/skis (in winter)