I'm brushing up on basic economic principles at the moment and in the course of my reading, I realized that I understand far less than I feel like I should, about the ramifications of economic policies within the U.S. and abroad.
For example, individual vs. systemic rationality (from Basic Economics, A Common Sense Guide to the Economy by Thomas Sowell, 4th ed.):
This is a pretty easy trap to fall into, I feel.
I also feel like I should know more about general car maintenance than I should. Then again, for most of my adult life I've lived in cities where a car wasn't necessary, or where cars were not the primary means of personal transportation.