ALWAYS be considerate of your mentor's time constraints.Understand that all experienced mentors have mighty demands on their time. This is why they are valuable. Don't monopolize or trivialize your mentor's time. If your mentor can spare only 20 minutes in lieu of a two-hour dinner at your favorite restaurant, so be it.
Use those 20 minutes wisely and considerately.
Listen, listen, listen.Along with preparing thoughtful and important questions, the most important thing you can do is listen carefully to your mentor's responses. Remember, learning is the most critical function of working with a mentor. Never focus on anything else.
Listening is not only the most important way to achieve this goal; it's the only way to reach your objective.