The mistakes beginners actually make
The most common beginner mistake isn't asking a bad question, it's accepting the first answer without checking it, especially on anything with real stakes: numbers, quotes, legal or medical specifics, or claims about a specific person or event. The second most common mistake is the opposite failure mode from the first lesson's lesson on prompting: under-specifying a request and then judging Claude's capability by a generic answer it was never given the information to make specific. The third is giving up after one unsatisfying reply instead of iterating, treating a single response as a final verdict rather than as the first draft it usually is.
A useful mental habit is to match your level of scrutiny to the stakes of the task. A brainstorm of blog post titles barely needs checking, you'll immediately recognize a good one when you see it. A specific statistic you're about to put in a report to your boss, a legal clause, or a claim about what a real law or policy says, needs independent verification before you rely on it, because fluent and correct are not the same thing, and Claude has no reliable way to signal which one it's giving you at any given moment.