in reply to
This year I plan to learn about:
non-Perl: Andy Ford
Toddler psychology & discipline
Having survived the toddler stage (my children are 17 and 20 years old), I've got to say:
At that time  the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.
Two words: classical conditioning.
Other opinion (please explain)
Results (255 votes),