I use block patterns. Generally from Eleanor Burns or Quilter's Cache. After I pick a block I like, I just start making them. When I have a bunch, I toss them on the bed. Next, I attempt to figure out how many more I need to make it a size I like. If I'm not sick of making blocks, I make more. If I'm sick of making blocks, I start adding borders. I guess that means I'm mixed up. I use a pattern for the beginning and wing it the rest of the way.