The Circle of Competence is a mental model that emphasizes the importance of understanding and focusing on the areas in which an individual has expertise, knowledge, or skills.

The PERMA Model is a framework for understanding and promoting well-being using five essential elements that contribute to human happiness and flourishing.

The Sunk Cost Fallacy is a cognitive bias where individuals or organizations continue to invest resources, such as time, money, or effort, into a decision or project based on the amount they have already invested, rather than evaluating the current and future value of the decision.

The SMART criteria provide a framework for setting effective goals that are clear, actionable, and have a high likelihood of being achieved.

Opportunity cost is an essential concept in economics and decision-making that refers to the value of the next best alternative that is forgone when a choice is made.

Parkinson's Law states that the amount of work required to complete a task will expand to fill the time allotted for its completion.

Brandolini's Law, also known as the Bullshit Asymmetry Principle, is a concept that highlights the asymmetrical effort required to create false or misleading information (easy) versus the effort required to debunk it (difficult).

Survivorship Bias is a common logical error that occurs when we concentrate only on the successes and winners of a particular process or event, while ignoring the failures and losers.

The Cobra Effect is a phenomenon in which interventions designed to solve problems end up creating unintended negative consequences.

The Cassandra Predicament refers to the challenge of trying to persuade others to take action based on information that is not yet widely accepted.

Economies of scale refer to the cost savings that come from producing goods or services in larger quantities.

Also known as the 80/20 Principle, the Pareto Principle states that roughly 80% of effects come from 20% of causes.