Here is the list of skills that I have come up with so far in simple outline form. Not sure how to break them down, and you probably already have the ideas in mind, but figured I would throw the list out in case anyone wants to add or subtract from it.
Fire making
bow / drill
flint / steel
lens ( magnifying glass / reflector )
steel wool
fire plow
Shelter making
lean to
pit / trench
snow cave
tarp
brush shelter
grass / thatch
debris hut
natural teepee
Water collection
solar still
dew collection
natural purifying methods
Food gathering
edible plants
Trapping
dead falls
snares
nets
Fishing
improvised line, hooks
netting
spear
Stone tools / Flint napping
spear head
arrow heads
knife blades
Orienteering / land navigation
map / compass
GPS
pace counters
needle / water compass
sun / stick compass
Cordage making
Knot tying