The data gathered could be really useful and helpful. You already do this every day when you talk about what's going on in your life. You do it in the comments section of your posts.
I was actually reading your commentary to your commentors when I was inspired as to the specifics of the daily journal as data collection point.@stellabelle
Listen you are an incredible author. This is just sort of formalizing something you are doing anyways. If you want to give it a shot, even for a few days it would be awesome plus a lot of other people would probably follow your example.
Thanks!