I have a quilted mini quilt made of muslin which I have divided into sections quarterly and diagonally so there are 8 divisions. I have stitched on the dividing lines, the mini quilt is bound, and I used a sharpee marker to write on each section what the needles are. I have made 2 of these. One I use for the basic needle sizes, and the other I use for specialty needles.
As I take a needle out of my machine, I put it onto the correct section of my mini quilt, and take out the needle I want to change to. Works really good for me, and if I can, maybe tomorrow I will post a picture so you know what this looks like.