This document introduces Systematic Inventive Thinking (SIT), a method for structured innovation. It discusses limitations of traditional brainstorming and how SIT addresses issues like cognitive fixedness. SIT tools like division, functional fixedness, and contradiction are presented to help break mental blocks. Examples demonstrate how applying these principles to existing components in a "closed world" can generate new ideas and functions. The goal is to teach that creativity can be learned and applied systematically to produce breakthrough results.