I started to try a programming language, Erlang. In fact, I've long known Erlang because I planned and edited the first book on it in Japan. I don't think I could then afford to use it enough to write an application, though. I've never used it much more than just trying sample programs in the book. Today I found myself somehow being able to mimic a sample program in another book on the language, and was really enjoying implementing my simple idea with it.