Quiltaddict has some good advice. I also loved the pictures of the string quilt that was posted.
Something you might want to consider is going to Craftsy.com. The 2012 Block of Month has two string patterns. The class is free. You can make these two blocks and decide which method you would prefer to use. Also make one block using paper.
Always make a sample block of any quilt you want to make. I learned this the hard way.
Happy quilting.