there's been stretches where I had a steady job in field, and then a side hustle in the same field that was basically all-you-can-eat work
the real hassle wasn't the two jobs, it was the knowledge "I could be working and making money" during my free time
otherwise I suggest large amounts of drugs and careful budgeting of dosing, take your downs on the drive home, ups before you're on the toilet
one time I was working overnights and days because it was a chance to work at (publishing company)
ngl I'm sorta glad that only lasted a week when I joined up the same day as layoffs, I think more than a week of that would have literally killed me