1. 25' braided silk rope with grapnel...easily braided together for when you need more length and strong enough for that fat half ork in full plate.
2. Tinderbox, fire starting made easy.
3. 3 vails of lamp oil, for when something has gotta burn, fast.
4. at least 3 days dry rations. Some places it's hard to forage.
5. 2 water/ wineskins. Cant be going thirsty.
6. 3 vails holy water. There are undead out there, you know.
7. a silver knife. Full moons make me nervous.
8. caltrops. for when running is an option.
There may have been a couple more things I am forgetting, but thats the basics that all our group carried with us at the start of any adventure. Of course everyone also had their extras, my theif always had a big ball of twine and a small mirror.
So what are your "don't leave home without it" items?
Game On!!