Dear former professor--
I asked you to write a recommendation letter for me for this school in September. I asked you again in October. I gave you all the materials you asked for the first week of November. I've sent you I-don't-know-how-many e-mails with a reminder about it. It was due on the first. You still haven't filled it out. They start reviewing applications next week. I realize you're busy, but seriously, you've known about this for months, and you've had at least two to actually write and submit the damn thing.
Argh.