There is so much conflicting advice out there even for something as fundamental as breathing:
Focus on breathing in - just let go of the out breath your body knows how to breathe out
Don't adjust your breath your body knows what to do, just observe
Breath in for a count of four beats, hold for four, breathe out for four and hold empty for four
Focus on a nice steady in breath - your body know how to breath out
And the same is true for investing, parenting, dating, managing your LinkedIn profile... you name it, there is A LOT of conflicting advice.
Whenever you get advice what do you do?
How do you know which is the best?
Most useful for you?
Fact is, you don't know and you're going to have to find out for yourself, by trial and error (or trial and success).