Quoting Nassim Taleb : "If someone is a drag on me, I cut them out. If someone lifts me up, I bring them closer. Nobody is sacred here. When the plane is going down, put the oxygen mask on your face first. Family, friends, people I love – I always try to be there for them and help. But I don’t get close to anyone bringing me down. This rule can’t be broken. Energy leaks out of you if someone is draining you. And I never owe anyone an explanation. Explaining is draining."
http://www.jamesaltucher.com/2011/02/how-to-be-the-luckiest-...