If you work with Photoshop files for work or play—or are learning the basics of Photoshop—the Photoshop Etiquette Manifesto is a useful tool for learning how to best organize your PSD files.
The Photoshop Etiquette Manifesto for Web Designers provides guidelines for Photoshop users—particularly, as the title suggests, web designers. These guidelines can make transferring and working with others' PSD files much easier.
The site provides "best of practice" suggestions such as organizing your layers into logical folders (by header, footer, etc., for example), refraining from stretching type or using the transform tools to resize them, and exporting your images for the smallest file sizes relative to quality needed. Keeping to these basics can help you become a Photoshop hero among your team members (or a "Layer Mayor").
The Photoshop Etiquette Manifesto for Web Designers [ via swissmiss]