[xupybd]

I've found the same thing. Learning design and architecture really helps. Also, reading books from authors that have been around for a long time helps impart knowledge that isn't so ephemeral.

Learning functional programming has helped as well. Not that the language I'm learning is so much better than anything else but that it introduces me to new ways of solving problems.

I also want to invest in my writing. Good documentation is becoming more valuable to me as I age.