Discarding beliefs that you do not believe is the fastest way to finding out what you do believe. Discarding potential solutions is the fastest way to find the correct solution. Whether it’s approaching a problem like on test with multiple choices and removing the most wrong answer, you make it much easier to determine the answer from a smaller set. This also helps you avoid choice paralysis.
I believe that discarding concepts to find the best possible solution whatever it may be for, is the most effective means of doing so. I learned this from a practical side studying Networking and IT Security and the metaphysical and more philosophical side from Alan Watts speaking on eastern philosophy.
Let me know what you think about this in the comments below and let me know the methods you find to work best for you!