My main concern is getting water. I spend most of my time in KY and we have more streams than you can shake a stick at so I always want to have a metal cup and some means of starting a fire and even some water purification tablets. If you don't get water then the other stuff in your kit becomes meaningless pretty damn fast.

Water is first. The fire is also useful for signaling and heat.

The second thing is shelter so I carry a tarp or poncho and some string that I can whip up a shelter with.

Third is food. I always carry more food than I need. Some people might say that is impossible for me to do knowing how much I like to eat! Peanut M&Ms are good and canned deviled SPAM!. I won't go into a long list but these are two of my favorites.

After these priorities you can pretty much figure out what you might like to have with you.