A nice project by Paweł Łyczkowski that can help you master reusable substances.
You will also be able to use this .sbs file as a tutorial, since it contains a lot of comments explaining what each part does and what to watch out for, and as a template – you can just copy parts of it into your graphs.
The folder contains following utility graphs inside (with descriptions):
You can copy them to your utility package, reuse and modify.