Many great suggestions! Just a slightly different slant. I almost always make queen sized quilts. Rule of thumb, takes approx. 9 yards of fabric, since I like controlled scrappy it is easy to pull five coordinating two yard lengths from my stash. Another thing that I learned from Bonnie Hunter, you can use approx. the same color in the same quilt in the same place in the pattern, it just adds interest. I guess what I am really saying is the choosing can be as much fun as all the other parts of making a quilt. Just relax and enjoy.