I was experimenting with it a couple of days and here's a quick brief.
How: All I used was Apple Notes on my phone to plan out the whole of next day the previous night. I would break the sections into "Morning", "Afternoon", "Evening", "Night" and add multiple checkboxes that act as to-dos for each part of the day.
Did it work?
Yes, and I would really recommend it. It feels great and gives you superpowers since you already know what to do during the day, and that you don't have to randomly find things to work on as your day progresses. This majorly improved my morning schedule which I would otherwise spend on checking emails, partially reading HN & Medium, oscillate between applications and be distracted. This also improved my productivity and I felt I should be checking off items one by one. The balance from the day would move to the next day, if applicable.
Why did I pause: The same reason OP started this thread for. I wanted to have a better way to handle the habits, and get an idea on how I perform and my completeness ratio. There are certain habits that get replicated across days. Notes is just meant to be a note-taking app. I wanted to try Trello with lists for each part of the day, but again, the completeness part is what I am really interested in.