In academia we are required to keep what is called a Curriculum Vita. What that amounts to is a list of all your presentations, publications, and service. I had to update mine recently and as I did it I was filled with warm memories of things I had done. In turn it made me think of the times that the adversary tempts me with thoughts of all my shortcomings and mistakes.
This is only for you to look at. It is not a brag sheet, it is simply a way to remember how you've spent your time so when the adversary tries to convince you you've never done anything worthwhile, you can take it out, read it, and remember the fun and worthwhile things you've done.