I don’t own a scraprack nor is it in my current plans, however, I am using their 4 category system to organize my supplies
1. Alpha/numerical (includes punctuation). I subdivided mine by color which goes against the recommendation to go by size. I figure I can change it if necessary.
2. Themes A-Z
3. Calendar (dividing in order events that occur in January, February, etc.
4. Rainbow – I divided my papers this way though I didn’t use the rainbow (roygbiv)’ I alphabetized my colors (black, blue, brown, green, grey, orange, pink, purple, red, white, yellow) with a multi/clear section at the end. I have three 12×12 plastic paper holders for each color. (Solid/patterns/scrap) and one 8 1/2 x 11 plastic paper holder for my solid paper that size. Also dividing my embellishments this way. The exception being paper/embellishments for specific themes (cats, Christmas, etc).
I have also created a catalog of my rubber stamps, numbered those and filed them in my rainbow cart (purchased at Sam’s Club for about $25).