I agree 100% -- when I find myself drifting off during the workday, I take a break for however long it takes to get back on the horse. Sometimes that's an hour

I agree 100% -- when I find myself drifting off during the workday, I take a break for however long it takes to get back on the horse. Sometimes that's an hour long bikeride, sometimes it's an entire weekend of "no laptop". In either case, the mind sorts itself. I know EXACTLY what I have to do during my next run and I'm motivated and charged to execute.