Charlie Munger is worth reading and listening to. He once said in an interview that a person should only be allowed to make 20 trades in their lifetime. (Or some smaller number.) His reasoning was that it would limit emotional influences when making investing decisions.

I've been wondering if Microsoft's stock price is low due to the perception that they aren't sexy. Their corporate division is making loads of money and they are priced like a low margin commodity business. Of course, maybe their long term survivability is in question and so the stock is low.

I would rather buy stock in Microsoft at its current valuation than buy stock in Twitter at its current valuation.