I've learned mainly by reading myself. So I don't think I have any original ideas. Certainly, I talk about reading Graham. I've read Phil Fisher. So I've gotten a lot of my ideas from reading. You can learn a lot from other people. In fact, I think if you learn basically from other people, you don't have to get too many new ideas on your own. You can just apply the best of what you see.
Managers thinking about accounting issues should never forget one of Abraham Lincoln's favorite riddles: How many legs does a dog have, if you call a tail a leg? The answer: Four, because calling a tail a leg doesn't make it a leg.
Risk comes from not knowing what you are doing so wide diversification is only required when investors are ignorant. You only have to do a very few things in your life so long as you don't do too many things wrong.