It's not easy to stick to an e-quiet day but makes a big difference

It's not easy at first to go completely e-quiet for a full working day. I look at what's "gathering" in the Inbox and if there's something really time-sensitive, will reply. The key is to make sure people understand you're still available, just preferably not by email.  My regular email signature says "e-quiet on Wednesdays but available by phone or Skype."