The above image is an example of Benjamin Franklin's daily routine. Before I jump into anything, what you want to get out of a day and what you need to get out of a day will vary greatly from person-to-person. So, take it with a grain of salt, because Benny wasn't gearing kids up for school or coming off of a night shift.
Which leads me to my next point... Find your reason for why a flexible "daily routine" might be useful. A few reasons I've discovered for having my own:
*I specifically mention putting boundaries around work, because I find that my "productivity" becomes less productive after so much time which might come across as taboo in a "work ethics" culture. Otherwise, I keep stuff flexible and simple.
Take your time.