HAVING DECIDED TO WRITE MEMOIR FOR A LIVING has its perils. For me, it has some extra-prickly ones, since my only sibling has been teaching memoir-writing for 13 years, and has a disarming thing or 20 to say on the topic—plus she shares a lifetime of my memories. Now Marion Roach Smith has tucked her tactics (along with a number of our childhood anecdotes) into “The Memoir Project: A Thoroughly Non-Standardized Text for Writing & Life,” which we’re celebrating along with the medium of memoir as a guide to life in my latest big giveaway. Dare to join us?