This is what I fill out on the boat. I then transfer it to a composition book when I get home. I have been getting lax with it lately and don't always fill it out completely.
I use this mainly to keep track of the catch for the year. I fluke fish mostly so this log is geared toward that.
I enter the size of the fluke (keepers only of course) in the boxes with the fisherman's name to the left. I also fill out the other information. But, as I said, I have been getting lax with this so I may have a few items I don't fill out. We have a pool for first keeper fluke caught therefore the first fish line in the log.
In the boxes on the bottom of the log I enter only the number of the type fish in the appropriate box caught for the day.
Now at the end of the year I can tell who caught what (Fluke wise). I can tell each guy how many fish and what size fish he caught during the year. The log doesn't do much more than that for me.
I personally think that there are way too many variables in weather conditions, tide, current, water quality, etc to be able to form a distinct pattern of when and where you will catch a fish on a particular day. I also don't think people who fish only once or twice a week are out enough for this information to be of much use. However, I do agree that you can limit your fishing locations for the day somewhat with the information you gather, but I do not hold it as gospel for that. An example, I may find that a certain area usually produces better during a certain tide period or wind direction, so that would be a good spot to fish at a certain time.
Feel free to use the log, changing anything that you feel would be better for you, or scrap the entire thing. It does work for me for what I want it to do.