Here are some top resources you can go to for help with creating SVG icons.
If you're thinking of creating an SVG icon system but not sure where to start or need a helping hand, these top resources will point you in the right direction.
Luke Whitehouse walks though how to use gulp as a build tool (GitHub repo here). Towards the end you'll also find code that will help you turn your SVGs into PNGs for browsers that do not support SVGs.
This tool from Filament Group is also really handy for ensuring your icon fonts load reliably. The repo gives a detailed guide on how to provide fallback in case of no @font-face support.