The average life expectancy is 75 years old and I don't know about you but life seems to go by faster the older you get. There's more to life than just to live. Knowing this, I would consider it a great shame to die with the only knowledge being that of my chosen career path. There's simply more to life than whatever we are learning in our careers.
It's been said that it takes 10 000 hours to master anything. Whether or not this is true is irrelevant for this discussion. What we need to keep in mine is that we only have a set amount of hours that we can dedicate to our activities as well as our learning endeavors. This means that we won't be able to master everything.
If you're like me, and wish to learn all that you can before dying, then where do you even start? Which book? Which audio? Which video? The answer is quite simple: Get the information directly from the experts.
"Listen to those with the fruit on the tree". -Ripencil.com
You may not be a philosopher but there are many that are/were.
You may not be a economist but there are many that are/were.
You may not be a carpenter but there are many that are/were.
You may not be a mechanic.... (you got the point?)
We're decades into the information age now. This means that the information is out there for who ever wants it. We can pretty much learn everything that we want from the devices we carry in our pockets. There's no excuse so get to it!