Dr. Andrew Weil: Pressing The Bar: Personally, I've learned that it's best for me to shut my devices off at about 3 p.m. It's often painful, but within a few minutes, the craving subsides and I move ahead with my day. If people insist that I must be "on" more than that, I am quite direct with them -- I don't, and won't, abandon this rule. If your job requires 24/7 connection, propose a change in company policy (as The Huffington Post has done), and if that fails, consider getting another job. We are often more free than we believe.
A must read for all.