I have a pretty green trash can beside my cutting table..all scraps go there...when its full (its a small one) I pull the scraps out, press them, and cut them into whatever size is the largest I can get out of the piece..i don't go smaller than 2 inches.I go up to 6 inches..........if its a long scrap, I do strips in all the sizes from 2" and 3" .....I have a shelf with buckets (these are the buckets that cat litter comes in)...these are labeled with each size, again from 2" up to 6" and the cut pieces go into their respective buckets..when a bucket gets full, I know I have enough to do a scrappy quilt...there are a lot of ways you can use squares and strips and if they are easily available you are all set to sew...I do have separate buckets for the squares and the strips of each size. Try to cut each scrap in the largest size you can, up to whatever your top size is .....