Usually, I listen to and incorporate the methods of people who have come before me who are experts in their own respective fields, and I do this all before I attempt to have self-assurance about my own "factualizing" of the world around me.
So, let's say I want to do something scientifically, then I first CHOOSE a person to listen to, like Eugenie C. Scott, for instance, if I want to learn to approach something scientifically. If, by contrast, I want to consider how the whole ball of wax fits together, i.e. consider all of the disparate pieces of evidence which humanity has about the material world and how it all becomes entangled, then I'll listen to and consider the ideas of a multitude of degreed philosophers. And if I want to know about religion, I'll listen to and consider the ideas of a bunch of ancient Jewish people, one in particular.
yep, that's about it.