Most 'bad' Claude answers aren't the model's fault. They come from prompts that leave it guessing. Here's what actually moves the needle, in order of impact.
Don't just describe the task — tell Claude who to be and what you're actually trying to achieve. 'Act as a senior copywriter. I need a subject line that gets opens from busy founders' beats 'write a subject line' every time.
The model only knows what you tell it. The single biggest quality jump comes from adding the context you're carrying in your head — the audience, the constraints, what 'good' looks like.
The laziest high-impact trick: end a complex prompt with 'ask me any clarifying questions before you answer.' It surfaces the two or three things it's unsure about instead of guessing. Try it on your next hard task.
Say whether you want bullets, a table, a tweet, or 200 words. Unspecified length defaults to long — which costs more and buries the answer.
A single example of the style or structure you want is worth a paragraph of description. If it works without examples, skip them to save tokens; if you need them, reuse them.
Want to see where a specific prompt is weak? We built a free tool that scores any prompt 0–100 across these exact dimensions and rewrites it for you. No signup.