I love the 1/4 circle blocks made from the Crazy Curves templates by Elisa's Backporch. No pins! You can make Drunkards Path and all kinds of patterns with them. I've done 3 so far, and will be doing more. Here are 2 I've done.
http://www.quilt-pictures.com/cat-circles.html
http://www.quilt-pictures.com/wedding-rings.html