I have mine in ziplock bags by (approximate) size. When I need a scrap it is usually a size- limited thing. If I have too many small crumbs I just sew them all together for a doll quilt. Or, these days, even throw out some of the really teeny ones.....
On the other hand, i have FQs in plastic baskets, standing up like hanging files in a filing cabinet, by colour, so I can walk through them with my fingers.