Here is the evidence of how organized I am capable of being when I put my mind to it. I may never conquer the kitchen counter, but I won the battle on this linen closet.
Each shelf is labeled with the size of sheets kept there, so they don't get mixed up. I figured out how to fold fitted sheets a few years ago so they lay pretty flat. I don't know how to explain it very well, but I tuck the elastic corners into each other. (There are a ton of videos on this on YouTube.) Once the fitted & flat sheets are folded, I put them inside the matching pillowcase, and fold the case over so I have one big flat rectangle. That's what you're seeing in this picture: bed sheet bundles that have everything in one package. (Along with a towel shelf and blanket shelf.) Saves me a lot of time, and it was also a good excuse to get rid of all of the random single bedsheets that my mother has given me over the years. (I have no explanation for this.)