I personally don't manage it well. I've learned to enjoy it probably to my detriment.

@santos gave a great talk at Startup Day a year or two ago where he recommends taking a 4-day weekend when you begin to feel yourself losing agency:

Burnout is the ultimate agency-killer. This is so true that I’ve learned to identify a reduction in agency as one of the first signs of burnout, one that shows up even before I consciously realize what’s happening. A switch flips and I start looking for ways to rule out ideas and actions, to conclude they won’t work or aren’t necessary, rather than chasing better versions.