Ok, maybe you don't have time to meditate for two hours a day. But if you can take a micro-break and shut your mind down (as much as possible) for even a couple of minutes, you're less likely to burn out. This web page, "Do Nothing For Two Minutes," has no explanation, and, as far as I can tell, no ulterior motive for its existence. I like it, and maybe you will, too.
Academiblog... Write your dissertation, get a job, get tenure.