I just finished reading this book a few days ago:

There is some very nice info in here on how to make sure that your goals are aligned with your boss’s, how to concentrate on the things that really matter, and how to stave off interrruptions (“nibblers” as the author calls them). In particular, I found her advice about avoiding email in the morning to be extrememely useful. Reading email definitely has a tendency to distract and especially in the morning it seems to get the day off to an unfocused, non-productive start.