I organize where frequently used items are stored in the most convenient places, and lesser used items are stored deeper/higher/more inconveniently.
...Basically, the items that are most frequently grabbed and put away get the prime real estate, while everything else is organized according to how often they'll be needed.
Another vote for Malkynn's method.
Regarding the amount of stuff - simple is better but most people have niche areas that need more organizing. You do you.
I keep a list of important serial numbers and year/model/make/purchase date and price info in the cloud for things like phones, laptop, bikes, digital camera in case of theft and for insurance purposes. Supplement that with a few sweeping photos of your home saved in the cloud or a fire proof box and you should have what you need in case of an insurance claim.
If you have a special collection or a few precious items of monetary or sentimental worth (ring inherited from grandma, heirloom instrument, hand painted collectibles) that would be hard to replace make sure those are documented the best - photo of each if needed, etc.
For ongoing daily organization, I have an app with pictures of my clothes so if I'm tempted to buy or thrift something I can see if it matches 3+ other items or is too similar to other items. I don't even have a big closet, I just like to be organized! I can also plan outfits for the work week, know my total wardrobe cost, and make packing lists. Overkill for others, but I like it since it is set up once (per infrequent new item) and always in my phone in case I want to see.
My partner uses Goodreads religiously to track a to-read list and what books we own. We only have 1 bookshelf, but between books coming in on library loan, audio books, and other reading it helps when we see a title on sale to decide if we should we buy it, put it on the library loan list, or pass it by.
I had bad storage set up for awhile where seasonal shoes and boots were put completely out of sight and mind, so every change of seasons I thought I needed to buy the same pair. Having clear shoe drawers near my closet now makes it much easier to find what I put away months ago and not just wear out the same few favorites.
I find all this organization is better for the way I think, even though I aim for minimalism and capsule collections and am not a collector in any sense of the word. Also, I just like lists ;-)
In drawers and shelves, the Kon-Mari style folding is great so you can see all the folded items easily and not mess up any piles.
I have seen some apps with bar-coding from your phone to use for inventory purposes. Maybe that will be good for you. The caution is to pick your focus area, or it could take over your life. Hopefully in getting organized you find the right amount in each stuff category for your personal situation.
I look forward to seeing more organizing suggestions here.