After reading the Woz interview in Founders, it's obvious that he wasn't paying much attention to the stock market. He was too busy doing what he loved. Their initial business approach (cash for product) may have been produced by their times, but they didn't let that stand in the way.

And that's the lesson for me. All I can control is my immediate situation. The other stuff is just noise best drowned out by hard work at things I enjoy.