At Houston Quilt Market, I saw a demo of the Clearly Perfect Angles template that clings to your sewing surface to help you sew accurate 45 degree angles. WOW it works. I have always took the time to mark a diagonal on my small squares when making my flying geese units. No more marking is needed with this easy template guide which is so easy and fast to use. Check it out in the notions section of the SuzzettsFabric link. Here is a picture of the template installed on my sewing machine. As a bonus, the template includes 1/4 inch and 5/8 inch seam guides.