Plan B

Always have a backup plan. Cliché? David Kord Murray, author of the influential Borrowing Brilliance, thinks not. Even the most careful strategy isn't as good as the one that expects to change course -- and can thus improve on the original concept in unexpected ways. Examples abound, from Wal-Mart and Facebook to Eisenhower's nimble approach to D-Day.

April 24: "[The HST] lifted a curtain from our view of the universe, changing it so profoundly that no human can look at the stars in the same way..."

Kenneth Calhoun (Black Moon) and Lysley Tenorio (Monstress) of the Discover Great New Writers program on B-movies, heritage, and finales.