Learn every human language (and invent one that is more pleasant, more practical and more efficient than them all), free up bytes by deleting my entire MP3 collection and playing all my music inside my head (I can already do this to some degree), go to bookstores and consume dozens of books at a sitting by flipping the pages and remembering every word, catch up with my pending movies by watching them all at the same time, periodically look at HD photographs of the night sky to scan for differences that might point to supernovas or incoming asteroids, and donate my spare processing power to run both LHC@home and SETI@home in my head.