I read Austin Kleon's book Show Your Work a few years ago. I really liked the idea, but I haven't followed his advice. The problem is, I don't know how.
If I were a painter or a furniture builder, I could take photos at the end of each day. If I were building a Truckla, I could create a documentary. Even if you didn't understand the details of the craft, you could follow along. How does this apply to software developers? Screenshots of code that doesn't work sounds boring even to me.
Do you know any good examples of software developers showing their work?