You might want to read this eBook.
Design Your Day is part of Nokia's Smarter everyday project, that talks very little about phones and quite a lot about how we could work better - and live better - in a connected, information flow age. I had some small hand in the early stage of the work through some consulting and writing work I did for Brilliant Noise at the tail end of last year and the beginning of this year. There's a much fuller explanation of what it's all about on the Brilliant Noise blog.
But don't download it because of that. Download it because it's got some really intelligent ideas - backed by neuroscience - about how to work well; it's about working better, not harder, knowing our limits - and planning for them. Designing your day, in fact.