I published a practical framework for transforming rough, unstructured ideas into high-quality, reusable prompts for Microsoft 365 Copilot. It introduces the GCSE (Goal, Context, Source, Expectations) framework, emphasizing that effective prompting depends on clearly defining the task, providing relevant business context, grounding responses in trusted sources, and specifying the desired output. The guide complements this with an interactive meta-prompt that gathers missing information, generates a structured master prompt, and supports iterative refinement. It also incorporates enterprise best practices such as traceability, validation, responsible AI usage, and human review, enabling users to produce accurate, evidence-based, and business-ready outputs across a wide range of tasks including drafting, summarization, analysis, planning, and Quality Engineering scenarios.