I've recently started a new plan to deal with frequent context switching and getting bogged down in low marginal value work. Each week, I'm ranking my top four priorities and devoting one day to each of them.

That might mean limiting your number of concurrent projects, or just putting some on the back burner for a week.

I'm a big proponent of taking breaks to stretch or walk around, whenever you start feeling burnt out.

Fortunately for me, my wife handles the meals.