I have a hard-cover spiral notebook that I bring on cruises. I take a few minutes each day to jot down my thoughts. I usually write in the morning, early afternoon, and just before going to bed in the evening. I always tell people that it's easy to spot me on a ship as I'm the one with the notebook. :smiley:
One of our neighbors does something very clever. He buys a regular notebook -- one of those hard-covered black/white ones that we used in grade school -- and jots down his notes on the right-hand side of the book only. He writes their location (latitude/longitude), weather, as well as what he did that day. After he's home and has his photos developed, he affixes those to the left-hand side pages to correspond to what he had written. They store easily and make a wonderful memento.