For small items like the gear repair parts and medical stuff you sub-categorize and inventory separate.
My 'go bag' has a small first aid kit and in my gear maintenance checklist is a line to check it biannually. So I don't list out its contents on the main spreadsheet with the rest of the pack, then when it comes time to check I can pull its inventory sheet, check the contents and expiration dates and order replacements as needed then. And at those intervals I'm checking the other similar kits as well.
Part of being prepared is not just buying stuff and sticking it in a box, organized or not, and being done. You must make use and test your gear and make it a lifestyle.
I'll give some examples. When I was young in the middle of the night one winter the neighbors a mile up the road teen aged son knocked on our door. Their house had caught fire and they had to escape through the windows because the fire blocked the hallway. He ran the mile to our house barefoot in pajamas to use our phone to call the fire department.
Skip 20 years ahead I'm living in a suburb and one rainy night we see the lights outside and find out our neighbors dryer in the basement caught fire and they grabbed their pets and ran out the door. Us neighbors all helped out with finding cat carriers and raincoats and such until the firefighters got their keys and wallets out so they could go to a hotel.
A co-worker had just moved into a new house in a new subdivision and that week we got hit by a bunch of snow. Subdivision lost power, he had a generator in a storage unit along with lots of other preps he had stored for his move. He took his family and rented a hotel room for a few days until power was back and he could then return home and start moving the rest of his stuff out of storage.
While we all like to imagine the end of the world scenarios a fire, flood, car accident, etc are much more common and likely to happen. So that's where I started and thought if I had to jump out my window because the house was on fire would I have a coat, shoes, keys to drive, etc. So my gobag with shoes and socks is beside the bed. Wallet, keys, etc go in tomorrows pants and shirt hanging with the bag. Bag has a jacket and raincoat. So If I should have to jump I can grab and go. That bag and gear stay there and stay packed and therefore stay inventoried and organized. Now plan something and go use it. When we go hiking,biking, kayaking or fishing or hunting or just travel out of town that bag goes. It gets used during the adventure and also functions as a get home bag. Those excursions work as both fun stuff for the family and a test. Your checklist should have a place to write down lessons learned, things missed, things needed or things that would be nice to have/do. Constantly review and improve.
There is your layer 1, one bag so enough to take inventory and keep that inventory up to date based on your check interval or after use.
Now if you do go out of town, even if its not overnight, maybe your just spending a Sunday in a state park an hour away, you know you will be using that first layer gear. So your inventory for that layer should list consumables, your FAK, batteries, bullets, trail mix, water, etc. I'll make up packs of those, kind of like how people meal prep and will make some meals ahead of time and store those in ziplock bags or plastic containers. Same here, small packs of consumables. Kind of a layer 1.5, which will make a little more sense here in a minute.
Now layer two starts into over night gear. You plan an overnight trip, visiting relatives or something. Your layer two goes with you. This is your basics, toiletries, change of underwear, socks, phone charger, laptop charger, whatever. Your layer two has those consumables to replenish layer one as well. So planned overnight gets simple because you don't have to pack, its already packed and organized.
Back to the scenario where you had to leave home for a hotel for a couple days, you grab layer one and two and out the door, everything already ready packed, and organized. When you buy new personal items, say your low on deodorant, you buy a new one and put it in the layer two and the one from layer two to wherever you normally have it. You don't have to count and inventory because you have replaced one for one. For the ' I bug in not out'. power goes out, you roll over and your headlamp is in the layer one by the bed. power is out for another day or two or three, you rotate through your layer two exactly the same as if you were somewhere else. it makes a SOP that works for either. Now you start the same with cooking at home, meals, etc. Follow a scenario through and organize and inventory accordingly.
This second layer can start to diverge into two, you can have a typical pre-prepared hotel suitcase type and a wilderness/make your own shelter bag like the common 'bob' ready to go as well. You assess the situation/scenario and follow your packing/checklist/sop accordingly.
