To give printed notes or handouts a polished, professional look, use a clean and consistent layout with clear headings and subheadings. Choose a professional font, such as Arial or Times New Roman, and maintain a uniform font size for body text, ideally between 10-12 points. Incorporate bullet points or numbered lists for easy readability, and leave ample white space to avoid clutter. Additionally, consider using high-quality paper and including your logo or branding elements where appropriate, ensuring that any visuals, such as charts or images, are high resolution and relevant to the content. Finally, proofread for typos and grammatical errors to uphold professionalism.