I do time blocking the first thing when I wake up,after I meditate and before I get out of bed.
It looks somewhat like this.
Wake up 3:30
Meditate 3:45 or longer
After that i block out time for 30 minutes to write + edit for the coming day.
Next wash up
Then continue the day.
Other tips that help is getting ready by set cothes out the the night before .
I am getting better at this as I go with being self employed.
It is best to take your deep work seriously and breaks too.
I break ever 15 minutes with writing and drawing and games