1. I should not follow advisory services. They are not infallible, either in Canada or on Wall Street. 2. I should be cautious with brokers’ advice. They can be wrong. 3. I should ignore Wall Street sayings, no matter how ancient and revered. 4. I should not trade “over the counter”—only in listed stocks where there is always a buyer when I want to sell. 5. I should not listen to rumors, no matter how well-founded they may appear. 6. The fundamental approach worked better for me than gambling. I should study it.