I slipped up. After resolving five years ago to never work from bed again—thank you, Montana—I did it again recently.

“I’ll just work a little,” I told myself. Several hours later, I finally put the computer down. It was AM o’clock and I was fried. With lights off, I stayed up an hour or two longer, still trying to solve work stuff.

Of course, I woke up exhausted and sluggish. Had an unproductive day. Struggled through much of it.

But it was an effective reminder: Working from bed and overtaxing your brain is no way to live—at least for me. To be fully operational, you gotta keep your thirds separated.