Open thread: What's the most useful type of content here?

This week I need your help.

I want to grow this newsletter so that it becomes more and more useful to you, so I’d like to get your help in shaping the content.

I know that you, like me, are passionate about the internal quality of the software you create. And like me you’re frustrated that there’s very little practical advice out there to help with refactoring, and with test-driven development in general.

So how can I help? What do we, as a community, need this newsletter to provide?

I’ll put my own...