Newspapers and airwaves are always full of information about successful investing, but how do you cut through to what really matters? After nearly 40 years in the investment industry, I believe there are 10 things that all successful long-term investors invariably do.

Tulips, South Seas, and Mississippi: short, true tales on three infamous manias in investing history.

For much of the past decade these quarterly reviews have contained references to the scourge of market and economic volatility, as we’ve been passing through an unusually disruptive investment and economic era. Thankfully, in 2017 volatility dissipated, (at least temporarily!). This quieter period can be illustrated by...