I put them in plastic bags with a note that gives size, which step it is used in and if I have changed a color in the patter I will put the original color used on the bag for refrence so if I am cutting a 6 1/2 sq for step 4 and the pattern says to use red but I want to use green the note reads;
6 1/2 sq
step 4
red to green
When quilt is done I through away my notes and reuse the bags.