In companies of all sizes, newly hired or promoted leaders have a relatively short window—typically 90 days—to make an impact. Those first 90 days are written about in books and articles, which should be read with your own job in mind. Each role has different priorities, so create your own checklist based on your department’s needs.

I recently interviewed Linda Lu, chief litigation officer of Nationwide Insurance. She started in March 2013 as one of four new direct reports to the company’s general counsel. Her team has 55 attorneys and staff members who manage all corporate litigation. Linda described the process she used to learn about her team and the job while considering changes.