I do not cut mine up at all, as sure as eggs, I would need it as is! Murphy's Law! I colour co-ordinate my fabrics though and put all of one particular fabric together, no matter what size or shape I have left of it. That way I know exactly where the last scraps of say a particular favourite is. I keep flannels separate. I do not keep really tiny pieces as I do not have the room but I do manage to use up most of my scraps in the end!
Gal