The importance of values.
It's one of the writing tasks we often avoid, but it's both helpful and important for understanding how we interact with other people.
I was recently writing a boring Terms & Conditions text for a website, and in the middle of my self-pity, I came up with a great exercise.
Even though such a text isn't my favorite piece of writing, it's quite useful to have.
It sets some clear boundaries to how people can interact with you, and you can use it for a lot more than people's behavior on a website.