As a young investor many years ago, I used to read and watch everything I could that related to the stock market, and even the financial markets in general. I was a huge sponge, eager to sop up information and opinions, no matter how good, bad or biased it might be. Eventually, however, as I began investing on a more regular basis–i.e., I actually began working and had more money to invest–I took a step back and examined my habits. Here I was, listening to pundits on TV and reading about opinions online, listening to people who were clearly...