Here are some common mistakes to avoid when writing a mission statement: Making it too long. A mission statement should be concise and to the point. It should be no more than a few sentences long. Using jargon or buzzwords. A mission statement should be written in plain language that anyone can understand. Avoid using jargon or buzzwords that your target audience may not be familiar with. Making it too vague. A mission statement should be specific and actionable. It should not be so vague that it is impossible to measure your progress. Not being unique. Your mission statement should be unique to your organization. It should not be a copy of another organization's mission statement. Not being aspirational. A mission statement should be aspirational. It should inspire your employees, volunteers, and donors to work hard to achieve your organization's goals.