

Most people who try Claude for the first time get a decent response, nod, and go back to whatever they were doing before.
They don't realize they've barely touched the surface.
Claude is Anthropic's AI assistant, consistently one of the top-ranked AI tools for knowledge work alongside ChatGPT. But "capable" and "easy to extract value from" are different things.
This guide covers what Claude is genuinely good at, and how to use it in a way that actually changes how you work.
The feature most people miss: the context window
Claude can read very long documents without losing the thread. Full contracts. 40-page strategy reports. 100-email threads.
This changes how useful it is for document-heavy work. Instead of manually summarizing a report before you ask a question about it, paste the whole thing.
Prompts that work well here:
Use format constraints aggressively
Claude is unusually reliable at following specific format instructions. Tell it "under 100 words, no bullet points, professional but direct tone, end with a single clear recommendation" and it will follow all of those constraints precisely.
Don't accept response 1
The first output is a starting point. The refinement is where most of the value lives.
"Make the second paragraph more direct." "What are the potential downsides of this approach?" "Give me 3 shorter alternatives to the opening line."
Give it a role
Starting with "Act as a senior [role] with experience in [context]" shapes the expertise level of the response.
The full beginner's guide with more use cases and worked examples:
http://rebuslabs.ai/blog/how-to-use-claude-at-work
If you want to practice these skills on real work scenarios with AI feedback on every attempt:
http://rebuslabs.ai