Always invest for the long term.

I don't have my diploma from the University of Nebraska hanging on my office wall, and I don't have my diploma from Columbia up there either-but I do have my Dale Carnegie graduation certificate proudly displayed.

The true investor welcomes volatility ... a wildly fluctuating market means that irrationally low prices will periodically be attached to solid businesses.

Investment students need only two well-taught courses - How to Value a Business and How to Think About Market Prices

If you don’t feel comfortable making a rough estimate of the asset’s future earnings, just forget it and move on. No one has the ability to evaluate every investment possibility. But omniscience isn’t necessary; you only need to understand the actions you undertake.

If, when making a stock investment, you're not considering holding it at least ten years, don't waste more than ten minutes considering it.

When we really sit back with a smile on our face is when we run into a situation we can understand, where the facts are ascertainable and clear, and the course of action obvious.