I recently read Sun Tzu's The Art of War. I read it a while back in college, but was only trying to get through the assignment as fast as possible so that I could go focus on more challenging chemistry assignments which sucked up all my time for a quarter.
The book contains pithy aphorisms, each served up in easily digestible portions to suit the busy warlord on a rampage. However, the wisdom is also useful in modern life, and strangely well suited to being read by daily subscription in an RSS reader. Dailylit.com offers the Art of War as well as many other titles. I started reading the book around Halloween, and finished by Wigilia (Christmas Eve). The RSS-able format is really easy to process, for this title at least, and convenient.