» Pick someone that knows you and your goals.
A common mistake when seeking a recommendation is to send numerous requests to faculty members who are not familiar with your work or goals. A recommendation is something faculty take seriously – be sure that you ask professors that know you and can earnestly recommend you to an honor society.
» Inform your professor that the request is coming.
Send a personal email or call your professor to let him/her know the request is coming, and express gratitude for the support in accomplishing your personal goals.
» Send a respectful reminder if you have not received the recommendation after one week.
Professors are often busy and despite good intentions can occasionally run behind. Don't get upset or angry, but instead respectfully speak with your professor to discover if the intent is still to submit your nomination. Be sure to let your professor know why this opportunity is important to you, and how much you appreciate the assistance.
» Always say "Thank You".
Whether your professor recommends you or not, remember that you are asking for a favor. Your professor is a busy person with multiple other obligations and many students asking for recommendations, and is considering using personal time to help you. Thank your professor whether you receive the recommendation or not, and today's "no" may turn into tomorrow's glowing recommendation.