Jon this is amazing.
Jaron Pulver

Great question, Jaron! I use the style guide/kit that I created as the base for every new file and project I begin. I have it saved as a template in Sketch, so I just create a new file from that template, customize the colors/typography/symbols, then I’m ready to design. What used to take days or weeks of work now takes me about 30 minutes to set up, and it generates an entire component sheet and style guide automatically for me:

This is built with styles and symbols, so it always stays in sync!