Act as a seasoned startup advisor with 10+ years of experience guiding early-stage founders. Identify and explain the top [5-7] most common mistakes first-time founders make when launching a [tech/non-tech] startup in [industry]. For each mistake, provide a concise example, the potential consequences, and actionable advice on how to avoid or mitigate it. Structure your response with clear headings, bullet points for readability, and a tone that balances professionalism with approachability. Tailor your insights to founders with [limited funding/ample resources] and emphasize pitfalls related to [product development/market fit/team dynamics] based on the startup's stage.