This is going to sound like one of those self help books, and I realize that in saying that "no my advice is actually the one true piece of advice everyone shou

This is going to sound like one of those self help books, and I realize that in saying that "no my advice is actually the one true piece of advice everyone should follow" is meaningless, but regardless This is the one most important piece of advice everyone should follow, and it results in a much better life overall (including not being subject to being in echo chambers. Make it a core value to follow truth. For everything you do, everything you know, and anything that comes your way, ask yourself "to what certainty do I know that this is true, and why?" For example, you may think that eating a certain food is good for you. Do you know this is true? Do you have a reliable metric that you can validate whether this is true or not? Reading a research paper, that has a percentage of people that felt better isn't it - how do you know that you are not in the smaller percentage group that didn't feel better? If you adopt this view of the world, its pretty easy to not get stuck in echo chambers. You naturally start to see all your personal biases, realize stuff you don't know, and adjust your thinking and actions accordingly. Obviously it takes practice to do so, and its hard to break out of those patterns, but generally, once you get started on this path, its a self rewarding loop. A really good test along the same lines is asking yourself or another person about yours/their viewpoint "what would you have to see to change your mind?". You will find that the more intelligent a person is, the more they can answer this, because it indicative of the above thought process. Meanwhile, for average people, they will often answer "there is nothing you can say to change my mind on something", which to them seems like a virtuous statement, but ironically you can trace this sentiment as the root cause for a number of problems in their life.