Well, I think the biggest mistake is not learning the habits of saving properly early. Because saving is a habit. And then, trying to get rich quick. It's pretty easy to get well-to-do slowly. But it's not easy to get rich quick.
Confidence is key. You're not going to put your money - you're not going to leave your money with me unless you're confident I'm going to give it back to you.
Investors... can't pick stocks that are better than average. Stocks are a good thing to own over time. There's only two things you can do wrong: You can buy the wrong ones, and you can buy or sell them at the wrong time. And the truth is you never need to sell them.
My rather puritanical view is that any investment manager, whether operating as broker, investment counselor of a trust department, investment company, etc., should be willing to state unequivocally what he is going to attempt to accomplish and how he proposes to measure the extent to which he gets the job done.