You may have wondered (though most likely have not as i suspect you are normal) how i manage to create the graphs such as on this page which shows the rolling stock and train companies i have traveled on over the course of a year. The answer is, i have listed all of my journies on rail in a little black book! I don't write down the numbers (my train spotting days can be left in my teens) but i note the type of train i have been on, and who operates it.
This then allows me to create graphs using Google Sheets and sometimes i publish them at the end of the year. So, i have been doing this for a number of years now but my book has finally run out of new pages! But fear not, i will start a new book next week...