While doing some research on user experience design I found a great content writing resource at voiceandtone.com. For those looking to write empowering content and communicate with empathy, this site is an excellent resource to refer to. It gives you a list of writing situations and some handy tips about tone and the users feelings to tune your content to.
This resource was created by mailchimp who, by-the-way, also have another fantastic resource in their own style guide which they’ve invited you to use and adapt as you see fit. Hooray!