I found a survey questionnaire here: http://servingwithjoy.weebly.com/uploads/7/5/0/6/75064257/servingwithjoy_maslach_burnout_inventory.pdf
As usual, if you feel you have burnout you should go to a therapist/primary care physician and do an exam to get proper advice.
Great article – it is really positive to read about somebody taking steps to take care of themselves. It is unfortunate that he had to quit his job (no sabbatical option) to do so.
And sell a “large chunk” of his equity to do so. Burns himself out to make the equity worth something, sells it to recover. Painful.