In true David Letterman style, this article presents a Top Ten List for why and how it's important to get to know the beginning teacher next door or just down the hall and listen for call signals. What follows is the Top Ten List for becoming a mentor: (1) establish reciprocal collaboration through trust; (2) offer a shoulder of support; (3) share the contents of your toolbox; (4) open the treasure chest of community resources; (5) provide on-the-spot answers; (6) model effective strategies; (7) reconsider your own practice; (8) be available over time; (9) demonstrate professionalism; and (10) gain new ideas and enthusiasm for the job. (Contains a list of 6 resources.)