Learn one thing, and learn it well:
Education is what you get sitting in a classroom reviewing & reguritating;
LEARNING is what you do on your own, and never, ever let on about, until you can get paid rather than penalized for it.
Exactly right. Amazon and Barnes & Noble have converted a significant portion of my earnings into books. That's is why I earn a pretty decent living as a computer scientist and electrical engineer. A tolerable situation considering my undegraduate degree is in molecular biology.
I tested my understanding of electronics and regulations at the FCC office. Extra Class amateur radio license, First Class Radiotelephone license and a RADAR endorsements.
The FAA office was pleased to test my mastery of the Jeppsen Flight Training manual. I just read it on the San Diego trolley on the way into work each morning. Scored 100%. My flight instructor was happy with that. He was getting paid with the money I earned teaching school in the evenings...after putting in a full day at work as a central office equipment engineer for PacBell.
Being employed in my current capacity means a continuous addition of books on the latest technologies. I have to train myself to do the latest technologies so that my company can bid that skillset against a future contract. It is an investment in a continuing successful future. If you stop learning, you soon become an unemployable dinosaur.