This is a catalog of tools for thinking.

An item is listed if it is a design pattern, a rule-of-thumb, a method of enquiry, a tool, a cheatsheet, a gimmick, an idea with broad applicability, a trend, a leverage point, a fact about a leverage point, a description of a system, a key question, risk, or unknown. The approach is anti-rigorous, with a focus on rhyzomic connection.