Graphic design is a powerful tool for communication, but even skilled designers can make mistakes that undermine their work. Common issues include cluttered layouts, inconsistent typography, poor color choices, and neglecting to consider the target audience. To address these, focus on simplicity and clarity, ensuring each element serves a purpose. Maintain consistency in fonts and alignments to create a polished look. Use colors thoughtfully, balancing contrasts and ensuring readability. Always design with your audience in mind, tailoring your visuals to resonate with them. Regularly reviewing and refining your work can help you fix errors and elevate the overall quality of your designs.