I personally use Adobe Illustrator alot, to save my time and work more efficiently, I have created serveral custom Libraries Illustrator Templates. I have one template with only RGB Color Swatches, one with CMYK Color Swatches, and one with minimal Library items. The minimal Libraries template has removed all unused/unwanted Library items and is use to create my Illustrator tutorial source file. This way I can cut down on the file size because each Library item in your file costs memory. The templates store the Color & Gradient Swatches, Art Brushes, and Graphic Styles that I commonly use in my illustration. Imagine the time it will cost if I need to remove all unused Libraries every time I create a new tutorial file. Or I need to open up an existing file to copy the Color Swatches & Graphic Styles that I want.