Ask HN: What are things I can learn within 1 hour that will make me a better SE?

I'm a self taught developer that has been working in the industry for a couple years now. I was pursing a part time master in CS but decided to take time off from the program due to the time commitment. I have about a solid hour each day that I want to allocate to learning new things that will make me a better developer. What should I learn? Also how can I break down larger concepts into chunks so I can digest them an hour a day.