... Well, a few years ago my trick to everything was the fact I had insomnia back then.
I slept only 4 hours, so at 8am I woke up and took care of the housechores, 12pm to 6pm took care of my brother and some of his friends who came from kindergarten (parents paid me to take care of them), then hairdressing from 6pm to 8pm under the hours my aunt needed extra help in her salon then I had a bit of free time to use the pc to chat with friends, watch anime and play games until dinner (10pm) also IK lived 3 streets away from my aunt so it wasn't far away
From 12am to 4am I used that time to draw commissions and for a webcomic, sometimes if I could sneak sketching a bit through the day I would.
When I was younger, I tried to draw for my own fanzines from 7am to 10am, also do housechores. Go to school, come back at 6pm. Take care of my then baby brother (cleaning was endless, since he had bronchospasm and an ear infection, so lots of vomit, liquid diapers thanks to the medicine, and the ear supuration/discharge), then from 10:30pm to 3am I continued drawing until my mom yelled me to go to sleep.
Nowadays I'm a full-time artist. I work from 9am to 5pm, sometimes I still have the habit of working past the hour and do extra stuff just in case. Right now I've been focusing solely on commissions due to some expenses, but once I move to a new apartment I'll go back to comic making, especially since I'll have a proper studio to work more comfortably. I visit family and friends, usually on the weekends
I like to keep my week schedule strict, I go to the gym 3 times a week for only 1 hour and a half mostly for my back, I talk to friends and family through whatsapp before 9am and after 5pm.
I take small breaks between tasks, trying them to be of 15min. During lunch break I watch an episode of a show or a youtube video, making sure its not more than 30 minutes.
The thing is that you won't know how to balance your working and comic making schedules until you are actually going through it, put a few goals and depending in how much you can achieve in that time, you'll be able to measure your expectations or the amount of tweaking you require so you can focus on certain things and how to balance them.