Prompt structure
Strong prompts usually include context, the job to be done, constraints, and a defined output format. Once those parts are visible, results become easier to predict and easier to improve.
Useful outputs
Useful output is not just well written. It arrives in the right structure for decision-making or production. That means asking for tables, bullets, drafts, or evaluations explicitly instead of hoping the model guesses correctly.
Reliability
Prompt quality improves when you stop writing casually and start briefing deliberately. Precision saves revisions because the model has less room to improvise in the wrong direction.