I use an excel worksheet. Printed out several copies and put them in a 3-ring binder. I seperate these by lake and have columns for water temp, date, productive lures, wind condition and a comment section that I can add any other info. as to the hows and wheres and who I'm fishing with. I also include a couple of picture binders with each lake to show fish I've caught there if a camera were available. In the first half of the binder I have info in there that I have gotten from the Internet referring to anything from lure color to locating and anything that pertains to fishing that I could find including an article from some guy named Dave Stuart on Ledge Fishing.