I also had a stack of 5" charms. I did the 'pull it out of a sack' method, but for me it was a bit too chaotic. I un sewed it into 4 patches, added white sashing and I love it now. It's a personal preference, but looking over the scrappy quilts I like the best, they all seem to have a single color sashing or accent block. Seems to tie it all together for me.