I always try to keep in mind that having any strategy at all, even if it's not the actual best strategy, is usually good enough. So while yes, a lot of the advice you get is bullshit specifically, generally following some system is almost always better than not following any system at all.

This is also something I try to remember when making a tough decision; how substantial is the difference going to be, actually? Usually it's not anywhere near as substantial/irreversible as I thought.

I've stopped fighting a great many work battles for this same reason, as well.