You Knowt I'm Going for a High in the Woods

The most productive thing you can do is put yourself in a position when you actually sit down to do the work that you can do it as efficiently, as effectively and as excellent as you possibly can. Another thought on this topic is, you do when you do deplete your batteries, which we all do on occasion. I think being a little more self aware allows you to to manage those crashes in a better way and more efficiently.