Buddhism and Stereotyping Perceptions

An answer has prodded me to completely reconsider my understanding of Buddhism and emptiness[ \[this answer\]][1] . I never realized that Buddhism involves the dismantling of preconceptions and false certainty. Due to some spiritual experiences, I feel it's clear that the path to a happier life for me is changing this. However, I know for a fact that I continuously generate such preconceptions and approximations almost pathologically. I feel that doubt greatly arises from this, in my mind; I keep making inexact and hasty conclusions, and assuming things. I cannot merely *not know.* My question is: **What are the ways to dismantle such biases of mind? I specifically mean those of speculation, stereotyping, jumping to conclusions, and so on.** Simply put, I'm wondering how one trains or comes to accept uncertainty.