If an asset has cash flow or the likelihood of cash flow in the near term and is not purely dependment on what a future buyer might pay, then it's an investment. If an asset's value is totally dependent on the amount a future buyer might pay, then its purchase is speculation.

By investing at a discount, Benjamin Graham knew that he was unlikely to experience losses.

Be sure that you are well compensated for illiquidity - especially illiquidity without control - because it can create particularly high opportunity costs.

Literally draw a detailed map-like an organization chart-of interlocking ownership and affiliates, many of which were also publicly traded. So, identifying one stock led him to a dozen other potential investments. To tirelessly pull threads is the lesson that I learned from Mike Price.

The cost of performing well in bad times can be relative underperformance in good times.

Interestingly, we have beaten the market quite handsomely over this time frame, although beating the market has never been our objective. Rather, we have consistently tried not to lose money and, in doing so, have not only protected on the downside but also outperformed on the upside.

Be focused on process and not outcome