People give me scraps all the time which I LOVE and a lot of times there are orphan blocks in the bunch. Where you run into a problem is when you have jewel tone blocks and say, pastel blocks. I now have separated the blocks and bits of 9 patches, runs of flying geese ect...into a few piles of similar colors and hues and plan to make quilts with them. I will just add strips or checker board sashing or HSTs in the same color values to the blocks to make them the same size, then sew them together.