Here's a little snip that gives a flavour of the paper:
The investors who trade too much, who don’t diversify, and who follow the crowd, are doomed to repeat the mistakes of earlier investors. Good investors don’t necessarily have to do much to be successful.
Though I've read this kind of advice before, it is handy to be reminded about it since the toughest thing to do is alter one's own behaviour! I can't show it to my wife though because it says women are better investors than men, ahem.
There are lots of references to the real academic research that prove the points for anyone who wants to get to the original source.