Okay...... I haven't looked at all of the replies yet, but I did see your pictures. oh my.
Without spending all night talking about this (as I could.... I LOVE organizing!!), here are the basic steps I would take.
1. Think long and hard about how you work and plan to organize your scrap supplies to work with your personal system. I NEVER do my pages by manufacturer.... so I would never sort my stuff that way. I need my stuff sorted by type.... rub-ons together, ribbons together, patterned paper together (and sorted by theme or primary color).
2. Take EVERYTHING out of your space and sort and purge. When you are done with this step, you should know how much space you need for each category (plus assume perhaps about 20% extra space for new stuff). NOTHING that isn't scrapping related should go back in this area (other than the business stuff in the file cabinet). I see lots of bags and totes and even some afghans and clothes in those pictures! Find another home for that stuff. I store my rolling scraptote in the attic, since I only use it about twice a year. It isn't effective storage for me, so I don't leave it in my scrap area.
3. If at all possible, find another home for completed scrapbooks. There really isn't any reason why they need to stay in the scrap space. Could you put them neatly in a nice bookcase in the formal living room or dining room??
4. Decide on a color scheme for that area. You have black metal, beige metal, wood tone, black plastic, all together. Personally, I would say stick with the woodtone with black accents... that way you don't need to repaint any of those bookcases.... although painting everything there a nice clean white or cream would make everything look more cohesive and neat.
5. Buy a label maker... you could use it! Every drawer and bin should have a nice neat label. Many scrappers prefer to make their own fancy labels, but I opt for clean and fast. I have a Brother P-Touch that I love, but the refill are expensive. But the labels stick well but also remove well (from plastic and such).
6. Buy some storage boxes, baskets, bins, drawers... (your choice) for your "stuff".... they should match fairly well to keep a neat look. I see you already have a bunch of green "marbled" photo boxes.... stick with that look if you prefer. Now FILL those storage boxes, etc, with all of your supplies. You may have to re-work the distribution as you go along.... some things will fit better in some places. And LABEL THEM!
7. Throw out excess packaging as you go along. That takes up a LOT of room.
8. Here are a few last assorted thoughts....
If you want to have some "pretty" storage (mason jars, colorful bowls, etc) put them on the baker's rack. They would look nice there.
Drawers work better than boxes stacked on boxes (looks like that is what you have on top of the file cabinets). If you are like most people, you won't want to move all of the top boxes to get to the bottom... so the stuff on the bottom goes to waste.
Repurpose stuff if you are on a tight budget. I found a bathroom medicine cabinet on the side of the road last year. I took it home, removed the mirrored doors and painted out the whole thing a light beige (matching my wall color in my scrapping space). I hung it on the wall above my Cricut and I store my cartridges in it. Plus I put some mason jars with buttons and ribbons for "pretty" storage. I'm not overly stressed for space, so I left my cricut carts in their original boxes, but if I were tight on space, I would remove the carts, keyboard overlays, and books and store them without the boxes (and either toss the boxes or put them in the attic in case I need them at another time).
I have also utilized the "Priority Mail" boxes for my solid color cardstock. I prefer that to be "open" storage right next to my scrap table, since I spend a lot of time going through it. These are light, easy, and free! If you want some upright paper storage, I highly recommend it (btw, before someone else mentions it, these should be USED boxes, not new boxes, since that is essentially "stealing" from the USPS... but if you ask at your PO, they may just tell you to take whatever you want).
Think VERTICAL space.... go higher, not wider. You could even put a narrow shelf up high on the wall and line it with boxes or baskets (I would prefer boxes with lids for dust purposes). If the shelf color and box/basket color was light, like the walls, it would blend in pretty well.
FWIW, the majority of my scrap storage is the 12 x 12 3 drawer Sterilite units from Target. On sale they are about $8 each. I have 18 of them plus two much larger 3 drawer units, 2 5-drawer units that are essentially the "legs" under one side of my table, and a small portable kitchen rolling rack that my Cricut sits on (but I hate it, so I am planning to replace it soon with more of the 12 x 12 3-drawer units). Most of the Sterilite drawers are stacked in two large stacks, but a few are on a bookcase that needs to find a new home.
I have some older pictures hanging around here on the DIS. I'll see if I can find them to share.
Hope this helps. Sorry if I rambled too much!! I LOVE organizing...... wish I could come help you in person!.................P
I did that last January, it took almost 2 weeks to go through and sort and categorize my stuff, but, it has stayed categorized and clean since. I can always find what I'm looking for 
