I don't think anyone can argue with is, and it may be stating the obvious for some. But as an example, I found myself recently effectively running my company's web-dev arm of the business, which meant doing pre-sales and proposals as well as having to concentrate on the actual coding and web-dev activities. I simply had to remove myself from the environment I was in (open plan office with 10 other helpdesk guys as well as sales guys constantly talking) find a desk with a window and a view, and no harsh air-con or server noises (and no other people!). I had found my zone.