How would you manage your valuable time effectively on a daily basis if you had a partner, a baby and 4 months free off work?

If you were a man in his early 30s, with a long-term partner and a 5-month old baby and you had the next 4 months off work completely free to do whatever you like.

How would you balance your day to make sure you have time to yourself (relaxation/fitness/walks etc) as well as giving your partner and baby a good amount of quality time? How would you manage your day/time?