If you put it on excel you can use the data to determine what to expect based on the weather, baits, temps, venue, what ever criteria you want really, quick easy and doesnt require pouring over notes. It just sorts it very quickly. Say you just want to look at carp on venue A and bait B on a sunny day temp 65f-70f then it will sort that information very quickly, I have mine come up in graphs. I have done a bit more than that, a but it can be as simple as you want it and whatever criteria you want to enter. All I did was enter the data after I had been fishing, which took 5mins. Original I kept notes for a couple of years then someone gave me a computer and I entered everything from the notes with some adjustments but never looked back; a lot of you could probably do the same. I would have liked to have kept a personal diary aas well but for gleaning valuable information in a twinkling, excel is a boon. You have to learn how to use little formulas but I did it anyone can! The home computer age, take advantage of it. If only I had this when I was 20 and the imagination.