The worst part for me was going from being a "rockstar developer" on the team to having to explain why I suddenly can't meet the overly ambitious deadlines handed down from above due to anxiety, depression, panic attacks and extreme insomnia.
Sorry for the crude metaphor. :)
One option is to find an enclave that is not a fast-paced startup.
Do you know how many big dumb companies out there are starving for actual talent? A lot! If you don't mind working with mediocre people and moving slowly, you can find a job in 'not hot' industries where the pace is not so fast. You might feel a little numb though :)
Isn't that exactly what hobbies and fun side projects are for though?