You try your best to make it feel like one of those luxurious Norwegian prisons.

Be autistic as well and give in to the autistic need for structure and routines.

I've had good results managing it by planning my week very loosely: I write down 1-3 things I plan to do each day (including work, exercise, cleaning, leisure, seeing friends, appointments) and it's just enough structure to keep me moving without being stifling.

Go to the wilderness and put yourself in a survival situation. There is no structure but if you don't do something then you will die.