This last point brings to attention something we can easily forget in our blind hurry to de-stress: We all need some stress in life! A stress diary can help you identify your optimal range. So for example, you might notice that you are at a stress level of around 2 or 3 out of 10, but that this level is relatively comfortable and a zone where you are at your most productive and efficient. You can learn not only the level of stress that works best for you, but also the kind of stress that is beneficial. This is a vital insight you would not get without taking the time to keep a stress diary.
