I don't pre-fill. If I have time and the guidelines don't say I'm not allowed, I will write narratives in Word and save to the cloud.
The majority of my prelim work is done on my iPad & it's easier to stop for a break or do a marathon of writing reports.
If I have a massive shop run, I try to record, to jog my memory at the end of the day.
Live your life in such a way that when your feet hit the floor in the morning; the devil shudders...And yells OH #%*+! SHE'S AWAKE!