I hope that you can benefit from a few or all of these best practices, tips and tricks, and keyboard shortcuts for layers. Learning to use layers in Illustrator can be a bit of work in the beginning, but with time layers will make your life easier, allowing you to work more efficiently.
Brian Wood is a seasoned web developer and web/print technology trainer. An Adobe Certified Instructor in Acrobat 9 Pro, Illustrator CS4, Dreamweaver CS4, InDesign CS3, and Photoshop CS3, Brian has authored several training books, including Adobe InDesign CS2 Hands-On-Training, Adobe Illustrator CS5 Classroom in a Book, and others, all published by Peachpit Press. He has also authored online training videos for Dreamweaver, InDesign, Illustrator, Acrobat, Expression Web, and other products.