Tips for Designing Print-Ready Marketing Materials in Illustrator

I’m working on several projects, including business cards, booklets, label sticker packaging , stationery letterhead, and large-format designs. I want to ensure my designs are high-quality and print-ready.

Could you share tips, best practices, or resources for creating professional marketing materials in Illustrator? Specifically, I’d love advice on handling branded elements, seasonal products, and gift designs.