How to be a 80/20 student?

Effective study technique: 80% of the benefit from school can be gained by doing the right 20% of the activity well.

sounds simple right? and it is very true! I find this is a useful tips:

To elaborate:
Seek 80/20 facts, when thinking with 80/20 aggressiveness (COPE):

Causes - symptoms>cause
Objective - what vs how
Patterns - linkages
Eighty/Twenties - priorities