How do I write research prompts that get consistently better answers?

Good research prompts share four parts: a persona (act as an equity analyst), a precise task with scope and geography, the context you already have, and a required output format. For deep research runs, add guardrails: which sources to prefer, what to exclude, and an instruction to flag uncertainty instead of guessing. Iterate; the second prompt informed by the first answer is where the quality jumps.