Personally, I just go fishing. The memorable days I never lose in my head and to be honest they are marked on a calendar, but not in any detail as to weather, temp, etc. Besides, the weather, water levels, etc., are so inconsistent from year to year, as are the runs, it seems kind of useless to count on the same results from one time period to the same time period the following year.

Not saying there isn't any value to keeping a journal, just not for me.