Update in OP. Organization ideas! Hit me up with some!

My disclaimer is I don't have a massive stash, which is why this method works for me.

I keep travel and Christmas in their own categories, with everything (except paper) stored in one drawer.

I keep all my die cuts, labels, chipboard, and other mostly flat things in small containers in a set of drawers that sit on my desk. I have the labels separate from all the other pieces because I use them a lot, and I keep them in the same drawer as my 3x4 and 4x6 journaling cards because in my brain they are a journaling thing.

I also keep my floral pieces separately as I found I wasn't using them when they were stored in with all the other die cuts. They're in an SC documenter kit zippered pouch, mostly because I have too many to fit into any of the containers I keep my other embellishments in.

All those other mostly flat things are kept in small containers by colour. I use die cuts, stickers (I cut up my sticker sheets after I've used them a few times and no longer reach for them for every page I make), chipboard, acetate pieces, felt pieces, puffy stickers, etc interchangeably.

The only other exceptions to this are all the animals, birds, butterflies, which I put into one container. It turns out I have quite a lot of them and I generally think of those in terms of "I want a critter" rather than "I need something pink, oh this flamingo will do". The other exception are the super specific pieces (think tents, clocks, work, weather icons, phones, typewriters, robots, etc) because I could never remember what colour the pieces were so I could never find them. I also leave this container on my desk so I rummage through it pretty regularly which helps me keep it somewhat under control, although it would also help if manufacturers would stop including such specific iconography in their everyday collections.

Ultimately, the way you look for things is going to have a big impact on the best way to store them. I've seen heaps of people do the colour binders like Janet from RTS, but the idea of taking all the time to prep the blank pages, then stick every die cut and sticker onto those pages, and then the tearing of the backing pages (and probably the die cut knowing my luck) is just way more effort than I want to put into a storage system, but the thought of rummaging through a container might be a block to your process.

I think the key as the others have said is to think about how you look for stuff. I look for paper by colour and embellishments by either theme or type - so that's how I organise them.

Stickers/die cuts/emphemera - are stored in file folders (in a file box) by theme once I separate from their kits (or if bought separately). A couple of bigger themes are stored in 3-drawer units on top of my paper cubes (travel, Military, Girl Scouts, Christmas)

A couple of months back, I did a full re-do of my scrap/art room which also serves as my home office 2 days per week, with the help of professional organizer. A few of my favorite things sine the redo are:

A cord orngaizer to corral cords www.containerstore.com/s/office/cable-management/12?productId=11014468

These multiple purpose bins for papers, note pads etc (they come in multiple sizes): www.containerstore.com/s/multi_purpose-bins/d?q=medium+multi-purpose+bin+translucent&productId=10022942

These bins for storing chipboard, art supplies etc. They stack and are all labeled; www.containerstore.com/s/white-plastic-stacking-bins-with-lids/d?q=large+modern+bin+with+lid&productId=11011449

I keep 2 of these on my desk for keeping my favorite tools, stamps, ink & new product within reach: www.scrapbook.com/store/sr-dsst-6697.html?w=totally+tiffany

I have this for tools, stuff I'm using and want to keep handy: www.containerstore.com/s/idesign-linus-divided-lazy-susans/d?q=Linus%5E+11%22+Divided+Turntable+Clear&productId=11001564

I do keep an Iris case for "fall" and one for Christmas (that needs to be purged).

The other big things were I purged a ton of stuff I was no longer using and she labeled everything. Now everything has a home and I clean up anytime I use the space. I know what I have and even have empty drawers/room to grow. It does to continue to evolve and change as what I'm interested in changes. I'm also still thinking about the best way to store my monthly kits. Yesterday I re-sorted my ink storage into a cart. It's so pretty and happy. I love my room.

It sounds like you’re totally on track! I’d just insert a step before or along with making your list. And try to resist buying more containers. (In the past I donated lots of containers because of putting the container cart before the supply horse.)

Pull out everything in every category - it doesn’t have to be every category at once - so you’ll better see what size and type of containers are needed. 

What also may apply is whether you’re more a flipper or like going through a stack. My die cutting CS scraps are upright in a bin in rainbow order so I can see all colors. I wouldn’t want them flat on top of each other - but others enjoy rummaging through a box. (I actually do but it’s more efficient the other way and I don’t get distracted.)

A bonus of pulling everything is you may really like 30 of the 55 things in a category or you may have 15 similar sentiments and only love 10. Keep a donate box by you. (And get it out of the house!)

When I started die cutting I didn’t consider fonts for sentiment/alphas like I do now. Some of my dies weren’t used or stopped being used because I liked other fonts more. Seeing all the dies spread out in each category let me pull a bunch to give away and donate.

I’ve purchased containers from The Container Store, a few from Target and a bunch from Ikea, which often has similar but far less expensive ones. 

First 3 steps of organizing
1. Declutter
2. Declutter
3. Declutter

That being said I have color drawers with small baskets inside for most of my stuff. If I have a collection things stay together Until I'm done with it. I also have a few themed bins-Christmas, Disney, Birthday, etc. It doesn't have to be all or nothing.

Check out Lisa Soares on IG. She’s done some neat Kallax organization lately.

instagram.com/lisasoares?utm_medium=copy_link

delete

Wanted to show a photo but they’re only on my devices/PC. Tried the URL in my SCS gallery, not that I post there anymore, but it wouldn’t work either. 

I organize primarily by frequently-used manufacturers (e.g. Chatterbox, October Afternoon, Echo Park), then by type. For each frequently-used manufacturer, the contents of ephemera packs are dumped into a Iris 4x6 photo case (& further divided into multiple cases by type - labels, journaling spots, frames, etc. - as needed); small sticker sheets are stored together in a tabbed section of a discontinued Clip-It-Up; 6x12 & 12x12 sticker sheets are in a paper holder. Likewise, supplies from non-frequently-used manufacturers are stored together by type in the same manner (e.g. ephemera in photo cases, small sticker sheets on the Clip-It-Up, large sticker sheets in a paper holder).

Note each frequently-used manufacturer is assigned a color (e.g. Basic Grey = grey; KI Memories = lavender; Simple Stories = kraft) & every paper or embellishment container, divider tab, etc. containing that manufacturer's supplies is marked with a punched shape (often similer to its logo) in its assigned color. Supplies from non-frequently used manufacturers are unmarked. The color coding makes it easy to find all supplies across various storage options for each frequently-used manufacturer.  

I like that!

good start - yes, do take before and after pics (or during ones as well).  And come join us on the organisation challenge thread posted monthly on the challenges board

I found these on Amazon. They are 2” shorter than the iDesign ones but far less expensive. And, they are not footed like the iDesign.

StorageWorks Narrow Fridge Organizer Bins, Clear Plastic Storage Bins with The Easy-Grip Handle for Freezer and Pantry, Refrigerator Organizer Bins, BPA-Free, 12.2" L × 3.9" W × 3.6" H, 4-Pack www.amazon.com/dp/B08PVBVGXQ/ref=cm_sw_r_cp_api_glt_fabc_7N6MK519E6SCZT2HPWF9?_encoding=UTF8&psc=1