Author Julie Morgenstern wrote an entire book on the subject, called "Never Check Email In The Morning.
Morgenstern has been a consultant for companies like American Express, FedEx and Microsoft since 1989 and has written extensively on organization and time management for publications like Forbes and the New York Times.
If you start your day off by responding to emails, "you'll never recover," Morgenstern
told The Huffington Post
"Those requests and those interruptions and those unexpected surprises and those reminders and problems are endless... there is very little that cannot wait a minimum of 59 minutes."
The problem is, email is reactive and not proactive, she
You just wind up bouncing from task to task, letting your inbox set your agenda.
Instead of starting your day with email, start by completing an important task that requires focus.
"It's hard to go from your transactional, shallow part of your brain, the frontal cortex, to the other parts of your brain where strategy happens and relationships happen," Morgenstern
"It's easier to start in the deep recesses of your brain and go to the shallow parts."
If you start your day with an important, focused project, "you'll get significantly more done," says Morgenstern
who emphatically notes that truly succesful people always start their day like this.