I used the Rapid Fire Hunter's Star ruler by Debbie Tucker. You have to try it! The instructions are really good, with lots of pictures and clear directions. I whipped this up in no time at all. Started it Saturday and finished it on Sunday. And this week I've almost got all 80 blocks made for Emily's quilt - that is how fast it goes!
You can see a demo of how to use this ruler on you tube given by Bayside Quilting. Try it out!