The end had some good pointers:
seek detail you would not normally notice about the world. When you go for a walk, notice the unexpected detail in a flower or what the seams in the road imply about how the road was built. When you talk to someone who is smart but just seems so wrong, figure out what details seem important to them and why.
This was one of the main things I struggled with when trying to get through some of the early examples in the Deep Learning book. “The Matrix Cookbook” was a decent reference manual but was lacking context and explanation. Thanks for writing this!