From the Stashbuster site:
I suggest picking out some scrap quilt patterns, writing the light/medium/ dark (or color or style) sizes of pieces needed on a label and put on the outside of the shoebox and start putting things cut to size into the box along with the pattern.
I have several on the shelf - they read something like:
Gaelic Garden (Title of pattern)
Green/Purple/ gold (or country or other style of fabrics or a color scheme)
48 - 2X2" squares
56- 2 X 5" rect
102 - 3X3"
56 - 3X3
24 - 3 X 5
Then as you add the pieces, put the tick marks next to the line to keep track of how much you have of each needed piece. Then you can add to them right away when you finish a project and then the scraps are no longer scraps, but pieces of a quilt. When you want to make the quilt you will know what you still need to cut from stash. There is little guilt about keeping things if you know what you are going to do with them. I do keep longer pieces in strips if I can, but am not afraid of cutting them up to add to these boxes. I have a bag of 1 1/2" squares to make Georgia Bonesteel's postage stamp quilt someday, so that is as small as I save.
Having several of these going helps to use up various colors or sizes of pieces, getting the best use of the scraps and not having to cut everything at once. This can be done as time goes on. If you really can't see a fabric going into something, esp if you have several of these going at once, maybe it's time to let it go.