Concept #3: What we understand about psionics we understand through observations. Therefore, it is useful for you to maintain a journal so that you can use your observations to further your own personal study in Psionics.
When practicing psionics, it is very useful(almost necessary) to have a journal to refer back to. You should record things in your journal daily, regardless of whether you practiced or not. At the very least, this is what should be included in your journal: