People who spend 12+ hours a day at work will not give you answers you wanted (they spend 12+ hours refreshing HN).
1. IC work - 6- 8 hours. 2. meetings/co-ordination/email - 2 hours. 3. Further learning/research - 1 hour 4. HN/Reddit/news - 1 hour.
This schedule allows for 2-3 hours for exercise, relaxation, netflix and hopefully chill.