Letters to Satan
Welcome to the holidays! HAIL SANTA!!! I don't know much about Satanic holidays, but I'd imagine that Santa gets his fill of ill-addressed mail.
Anagrams are kind of fun. More often than not, I associate anagrams with interview questions, as this is typical for programmers. Seldom do you find yourself actually using anagrams in practice, but they make for fun little contrived algorithm problems.