When stepping into a new, challenging leadership position, spend your first 30 days listening, and studying the company and the challenges it faces, says Fortune's Anne Fisher in her Jan. 20 Ask Annie column. Have you ever had to step into a new job and correct a disastrous situation? What worked (or didn't) for you? Your bosses? How have you coped with low morale among coworkers? How can you keep both employees and higher-ups happy?