Why it's worthwhile to start a decision journal Its purpose: to reflect on and improve your very approach to decisions. By recording and regularly evaluating them, you'll better understand your thinking, and you'll notice what you tend to default to and what traps you most often fall into.
For example, you'll see that you act irrationally during times of stress or a tight deadline. By being aware of your reactions, you can mitigate the consequences in similar situations in the future.
Keeping such a diary will also help combat a cognitive distortion called the "Hindsight bias". It is this: what has already happened always seems obvious and predictable to us. We even begin to believe that this is what we thought from the beginning, which means that we can foresee events in the future as well. This leads to unjustified confidence in our rightness.
Understanding exactly where you made a mistake and why is very important. Such information will help you correct your mistakes and make better decisions.
