I just finished Shop Class as Soulcraft: An inquiry into the value of work by Matthew B. Crawford. It's basically a collection of thoughts around what makes work meaningful and valuable from a man who moved from academia to manual trades. I didn't necessarily identify with his picture of white collar work, but I found the things he had to say about thinking and problem solving being constantly necessary for someone like a mechanic or electrician very interesting. It's worth taking a look at.