PostSecret invites people to share secrets anonymously. Be brief. Be legible. Be creative. Write your secret on a 4×6 postcard and send it by snail-mail to PostSecret, 13345 Copper Ridge Road, Germantown, MD 20874-3454 PostSecret has been a Sunday Tradition for a lot of people, as that’s when the new secrets are posted. There are a number of PostSecret books now. A Lifetime of Secrets: A PostSecret Book by Frank Warren is the latest of these books. More postsecets to make you laugh and make you ponder. Is this real, or just a lot of silliness? A place to get…