I agree with Angel, but I'll take a 300 yard spool of 550 cord, you can never have to much cordage! If I had to limit myself to individual items instead of generalities...
1. 100' 550
2. custom survival axe (in development)
3. custom multi tool (in development)
4. 25' x 25' heavy duty plastic tarp, dark as possible
5. stainless steel cooking pan/pot
6. extra large adjustable bic lighter

I am basing my list solely on staying alive where I am, not on being rescued. Rescue should of course be your ultimate goal but keeping alive until then is the key.