10 Essentials

The BSA trains each scout to bring the 10 essentials anytime they are participating in an outdoor activity.
Updated Ten Essential "Systems"

1. Navigation (map and compass)
2. Sun protection (sunglasses and sunscreen)
3. Insulation (extra clothing)
4. Illumination (headlamp/flashlight)
5. First-aid supplies
6. Fire (waterproof matches/lighter/candles)
7. Repair kit and tools
8. Nutrition (extra food)
9. Hydration (extra water)
10. Emergency shelter

To read more on this topic, visit REI's 10 Essentials site.

Scouting Magazine also talks about the 10 Essentials.