That's my system, a little bit from a different perspective.
0.5 day:
- Items you need for given activity (compas, map, knife etc),
- clothes on your back.
1 day:
- items you need for your activity
- clothes on your back upgraded with some "just in case" (rain, cold).
- fuel for you (water, ready food).
2 days/overnighter:
- items for your activity
- clothes on your back, upgrade to just in case, upgrade with spare underware.
- body and kit maintenance pouch (hygiene, ist aid, duck tape etc)
- fuel for your body (this is border line where you can get by with ready stuff, or upgrade to cooker/water purification).
- sleep system: something to sleep in, on and under. For one night you need only basic like pad, bivvi, SB.
3 days or more:
- items for your activity
- clothes on your back and spares.
- body and kit maintenance upgraded to proper 1st aid kit, full wash bag etc
- fuel for your body and ways to replenish them like water purification system, cooker, hunting/fishing stuff.
- upgraded sleeping system, something bombproof as you can't afford soaking wet kit for your next night.
Clothes: underwear, insulation, shell, acessories (gloves, gaters, hat, mosqito head net, etc).
Sleep system: Tarp, ground sheet, hammock, quilts.
Fuel: water filter+bladder+bottle, alcohol stove, big+small pot, KFS set, cutting board/plate.
Body maintenance kit: hygiene item, 1st aid kit combined with kit repair stuff as they are interchangable, d tape can hold a broken finger for example.
Toys/activity items: compas, map, torch, multitool, knife, axe, etc
The biggest thing about the kit is deciding wheather given object is really needed or just a comfort item (and you are happy to carry the weight).
Also don't get caught in "just in case" mentality. One reason I don't like survival kits in the woods. You are carrying a pretty good survival kit on your back already.
Hope it helps.
