I usually always have:if we are talking pure survival here are the most important items needed
compass
signal mirror
whistle
purification tablets
next to water, these are the only things you need to be rescued. heat, food and shelter are luxuries that can be put off for four days (the maximum average time frame of case study rescues)
Fox 40 whistle (one of the loudest whistles that I have found)
Good signal mirror
A compass that I stole from some marine, oops.
Purification and electrolyte tabs
SAM splint (My ankles suck and I don't want to use sticks)
550 cord
flint
That is my gotta get out now or die kit in a separate small bag.