From a Slate advice column:

I am a college professor and administrator who often makes a great deal of appointments with students, staff, faculty, and people interviewing for new positions. I try to use good manners at all times. (I send thank-you letters when appropriate, I don’t rush my appointments, and so forth.) If meetings are set up weeks in advance, I often send a reminder e-mail or phone call. However, when students set up an appointment to see me, many fail to show up. This even happens with some faculty and staff. When I ask why, they often tell me they forgot and that I didn’t send them a reminder. I sometimes have 20 one-on-one meetings in a week, so this is impossible for me to do. Is it bad manners? Should I send a reminder to all individuals who have an appointment with me?

I think we should use stimulus money to subsidize daily planners.