Abstinence
Discernment (how to figure out the real crazies)
Self control
Healthy dose of cynicism
These skills pay off more than others I’ve seen on this list:
1. Designing and compensating a switching regulator
2. Designing and compensating an LDO
3. Designing and compensating a Bandgap Reference
4. Designing and compensating an amplifier
5. Designing a comparator
6. Computer hacking skills
7. Bowstaff skills
8. Baking a cake