This is not on paper but I do the same thing on paper when I'm away from the computer. On my computer a cron job just pops this into a Dropbox folder as YYYY-MM-DD.md and I edit it from there.
There are some neat journaling cues available if you read e.g. "The New Diary" by Tristine Rainer. Like writing in the third person, or just viewing a diary/journal as a place to scribble down work notes and improving on it from there.
I probably change my own template every 1-2 months. You'll see on the "schedule" portion that the least productive part of my day is 1-3 p.m., so I encourage a lot of fun and relaxation during that time as a way of releasing anxiety and picking up task momentum.
Most of my work in the journal is under the "other" heading, and I don't fill out every heading every day. Most entries just have a score for the day, some notes on why I chose that score, and ideas to improve it, and then a lot of ideas under "Other".
Every Friday I do a sort of "information archaeology" thing where I go back over my paper & digital journal entries and round up reusable tips or things I've learned into a "frameworks" folder where I have separate files for things like building websites, coding, preparing for meetings, working with various types of people, possible new hobbies, etc. The recapture of these ideas has been worth quite a lot to me, as it feels like I have a better foothold next time I encounter the problem.
Your template is much more complex than I was thinking. I can see though if reflection is the goal, then a format that encourages that makes a great deal of sense.
