I don't know if this will help anyone but it might so I'll post it.
I have a whole foot locker full of controllers, AV cables, power cables, etc. and the way it used to be it would always turn into a gigantic rats nest regardless of how neatly I wrapped and tied the cords. So I went to the Dollar Store and bought a few boxes of the medium sized zip lock bags which are perfect sized for a controller and put each cable/controller into it's own bag. Since everything is in a bag each item slides around, nothing gets tangled together and it's quick and easy to find whatever you're looking for since the bags are clear and you can still see it all.
Pretty basic tip, but I had a big tangled ball of controllers and cords for a long time before I figured it out so just figured I'd mention it. I don't have the room that some of you guys do to put everything out on display so I keep about half of my stuff in storage bins or trunks.
I have a huge problem with dust for some reason. So I also use zip lock for cartridges and the like.