Here's my way for making one at a time. There are also on the board links to making a continuous row of them.
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Take your square of fabric (practice with paper for correct size) Fold in half. with raw edges at top fold up bottom corners to center of raw edges. Press and use!
Here's the link for all the methods that have been posted on the board:
http://www.quiltingboard.com/search....archid=7168484