I love these, especially the slightly grumpy ones about whether authors can be reasonably expected to answer essay questions as part of a student's homework assignment! Oh, and the answer to "I love your work, but your latest story stank," is spot-on perfect. Heinlein's Fan Mail Solution (Thanks, George!)
Heinlein engineered his own nerdy solution to a problem common to famous authors: how to deal with fan mail. In the days before the internet, Heinlein's solution was fabulous. He created a one page FAQ answer sheet -- minus the questions. Then he, or rather his wife Ginny, checked off the appropriate answer and mailed it back. While getting a form letter back might be thought rude, it was much better than being ignored, and besides, the other questions you did not ask were also answered! Indeed, it is both remarkable and heartwarming that Heinlein replied at all to most mail. Can you imagine other great authors doing the same -- even with a form letter? Heinlein's form is very entertaining to read because you are forced to reconstruct the missing requests.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.