I've been working on a beautiful quilt lately. Currently, I'm doing lots of these...
I finally finished (without going blind) and the quilt is on its way home. When it arrives, I'll post pictures. Until then, I thought I'd share this cool tip that I discovered from my guild-mates here in Washington.
Diagonal seaming for quilt backs. Of course, this won't work if you are piecing your back. But if you're not, this not only works well but will save you fabric. John Flynn apparently developed the math for this and if you have a "smart phone," you can download the app so that you NEVER have to do math.
John's method is for diagonally piecing a quilt back in the most fabric-efficient way possible. If your fabric is 44" wide or less, you can piece a back that is 66" or less. If the fabric is 60" wide, use John's method if you want your quilt back to be 90" or less.
John's Diagonal Piecing full instructions can be found here. Its definitely worth having in your toolbox of piecing tricks.
I'm planning to give this a go as soon as I have a quilt that needs a back.