and then start every morning with an empty page
It's pretty simple.
As a data hoarder something like onetab is amazing, there is still a lot of room for improvement though in browser ergonomics, session resets that force you to log back in and refind your place, it's nice to see some tools like data bricks that will at least let you reauth in a new tab.
But! I've learned to harness the power of ending the day without complete closure. I stop work when I know the next step I'm about to do fully. Then the next day it's completely obvious what to start with, and I'm back in the flow without procrastinating as much.
It took some attempts to get comfortable with this; NOT finishing can be kind of excruciating if you're not build for work/life separation. But once I learned to delay my gratification in this regard, I found it set me up for many other things that require daily habits. I also balk much less at "this will take daaaaays" scenarios in general. I'm more comfortable now with things that stretch over longer periods.
I somehow started doing this from the very start of my computer interaction, so I never understood why people find it weird. But now if I keep my system on, I feel uneasy, as if I have work pending, so I am make sure to shut it down at the end of day everyday :)