I have a fishing journal that goes back several years. It's actually a few notebooks worth now. A few years ago I stopped recording every trip just because a lot of things were sort of repetitive. Entries since then have only been for new locations, places I don't fish often, unique days, or banner days. One of the most useful pieces of info I have in my journal is river flows and notes on how a river looks and fishes at a given CFS. Valuable stuff at a time like this when I'm waiting for the rivers to drop into fishable shape. I had a very successful trip for silvers one day last October on a river that was barely getting into shape. Nobody else was there and the coho were going nuts. I checked the USGS flows this morning and then looked in my journal to see what flow I'm looking for. I DIDN'T ENTER THAT DAY IN MY JOURNAL! I was there at the exact time when the river became fishable and I don't know what the flows were. Now I'm digging through previous days and old journals trying to get an idea of when it's time to go but I really want to know that one day's flow. Keep a journal and use it!