So for my first share, here is how I store my ribbon and my cricut cartridges. I bought a narrow CD tower at IKEA. I tilted the shelves and that is how I keep my ribbons in place. You can see in the second pic that the back pegs that hold the shelves in place are one slot down from the front ones. With the tilting, the spools stay in place at the back of the unit. I got so tired of dealing with the storage unit I had with the dowels. As you can see I like to store mine by colour and it was always such a pain to insert a new ribbon spool into the colour family when they were in the dowels. Also, inveriably it was always the one in the middle that would be finished and need to be replaced. This way, I just add in and take out what I want without any problems.
As for my cartridges, I bought the double wide CD tower also from IKEA. I've been looking at the various boxes and binders that you can buy in order to minimize the storage space for the cartridges, but to be honest, I like mine in their original boxes and right where I can see them all at a glance. This helps remind me of what cartridges I do have. You might think that if I need a reminder then I probably have too many, and you may be right, but I love all of my cartridges and do use them all :-) I keep all my Disney cartridges together on the top shelf. My solution cartridges are in the double cartridge boxes and I keep those together on the bottom shelf. Also on the bottom shelf are all my cake cartridges. All the others are kept inbetween in alphabetical order. It just helps me find it fast when I'm looking for a specific one. I think they fit perfectly on this unit and I still have space to add any future ones that I may want to purchase ;-)
Since these units are the same length and depth, they look great side by side right next to my big closet, but that is a storage share for another day. If you have any questions, please email me and I will try to help.