Naval Podcast: The Ultimate Foundations Are Math and Logic
Macroeconomics is voodoo science meets politics.
You want to focus on the foundations. The ultimate foundations are math and logic. If you understand those then you have the basis for understanding the scientific method. And once you understand the scientific method then you can understand how to separate truth from falsehood in other fields.
I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times. - Bruce Lee
The 5 most important skills are reading, writing, arithmetic, persuasion, and computer programming.