Notes
If nothing else, it looks neat.
I've recently taken to carrying a small notebook to capture my transient thoughts and observations throughout the day. I find I am inspired to write many times during the day, and end up forgetting what it was I was inpired by - which in turn makes me rather apathetic: knowing I had a good idea and now have lost it forever.
And so I've turned to what humans have turned to as a memory aid for thousands of years: the decidedly low-tech pencil and paper. It seems to be working great.
If nothing else, it looks neat.