This image has been floating around Facebook lately but with no links to instructions on how to fold the paper. Well, I was able to dig up a couple links that you should find helpful. Here is a video that should give you a good idea visually (right here).
But probably the best resource I found was a roundup of 10 different snowflake ideas including an idea that uses junk mail. Very cool! See all 10 ideas here.
And lastly, I was eventually able to discover more details on the image above that includes a folding guide for the paper and large photos so you can copy the pattern you like best.