There are books on how to cut scraps into pieces ready for quilting. The key is usually to cut them so that they can be sewn in multiples. Here is one of them:
http://www.amazon.com/ScrapTherapyTM...dp/1600853331/
This author also has a website:
http://hummingbird-highway.com/
Here's another one:
http://debbiesdabbles.blogspot.com/2...p-therapy.html
I think there are some Youtube videos also on cutting scraps. Will post if I can find some.
Edit: Haven't watched them yet, but these look on-topic:
https://www.youtube.com/watch?v=hPspksbaSok
https://www.youtube.com/watch?v=wPascPNaJjM