One online confessional, though, breaks the mold. At PostSecret, found at postsecret.blogspot.com, the confessions are consistently engaging, original and well told. How come? The Web site gives people simple instructions. Mail your secret anonymously on one side of a 4-by-6-inch postcard that you make yourself. That one constraint is a great sieve. It strains out lazy, impulsive confessors.
