I second the Bonnie Hunter reference. here's a link to her Scrap User's System:
http://quiltville.blogspot.com/2005/...rs-system.html
After you have been quilting a while, you may find that you are drawn to certain types of quilt styles (large patches, small patches, applique etc.). This will help with deciding if you want to pre cut your scraps and how small a scrap you want to deal with.