I know Mark had a portfolio at one point. Any tips, Mark?
I do still spend quite a bit of time on the stock market but not trading much, just looking after my long term investments in oil.
I'm certainly not qualified to give advice but generally I would say: Start out small fully expecting you'll lose it. And be positive about that because they are necessary lessons and will help you understand whether you have the right character. Doing well on the stock market as an aggressive investor (opposed to particular funds) is about character first, and then time, effort, intelligence. Don't diversify for the sake of it - a handful of companies is good to manage. And especially don't diversify between sectors. Pick a sector of interest and stay within it.
Oh and if every time you look at your portfolio you don't just see numbers but instead make materialistic connections (new tv, shoes etc), then you're gunna have a bad time.