But the tools of thought that the literature describes are invaluable with one very important caveat.
The moment you think something like "I am more correct than this other person because I am a rationalist" is the moment you fail as a rationalist.
It is an incredibly easy mistake to make. To make effective use of the tools, you need to become more humble than before you were using them or you just turn into an asshole who can't be reasoned with.
If you're saying "well actually, I'm right" more often than "oh wow, maybe I'm wrong", you've failed as a rationalist.