I like Investment U for their brief profiles of some of history's greatest thinkers and investors. Today, we link to an essay on one of the great figures in trading lore, Jesse Livermore.
Read on for, "Five Timeless Rules of Investing Learned From Jesse Livermore".
If you don't know who Jesse Livermore is, that's okay; they've included a nice little summary intro on his life and his trials as a speculator.
Also, if you have an interest in trading or market history, I would highly recommend reading Reminiscences of a Stock Operator, if you haven't already.