-How to lose weight:

Common sense (wrong): do intense exercise an hour per day -->
Actual path to achieve this goal: eat better, let your body burn fat 24 h per day --->

-How to build solid relationships with people:

Common sense (wrong): be funny, talkative, outgoing --->
Actual path to achieve this goal: be patient, start slowly, go bit by bit, do small favours, talk about things you have in common, etc --->

-How to excel at some subject (Maths, foreign languages, business, etc)

Common sense (wrong): learn simple formulas that give you quick understanding
Actual path to achieve this goal: read, experiment, analyze, weigh alternatives

-How to know what is going on

Common sense (wrong): brainstorming, analyze potential scenarios (most of them will never happen), expecting that others will do x instead of y or even z --->
Actual path to achieve this goal: relax, imagine, sit down in a silent room or in a park and reflect. Go for a walk and let ideas come to you --->