Fighting emotions is like flailing in quicksand — it only makes things worse. Sometimes, the most proactive “defense” is a mental nod and wink. - Tim Ferriss

Lacking an external focus, the mind turns inward on itself and creates problems to solve, even if the problems are undefined or unimportant. If you find a focus, an ambitious goal that seems impossible and forces you to grow, these doubts disappear.

Charles Munger, right-hand adviser to Warren Buffett, the richest man on the planet, is known for his unparalleled clear thinking and near-failure-proof track record. How did he refine his thinking to help build a $3 trillion business in Berkshire Hathaway? The answer is “mental models,” or analytical rules-of-thumb4 pulled from disciplines outside of investing, ranging from physics to evolutionary biology. Eighty to 90 models have helped Charles Munger develop, in Warren Buffett’s words, “the best 30-second mind in the world. He goes from A to Z in one move. He sees the essence of everything before you even finish the sentence.

If you can’t define it or act upon it, forget it.