One of the overriding themes of [quality] self improvement philosophy is to avoid negative people. You are who you associate with, and surrounding yourself with negative people who only see the downside of every situation will negate any work you do on yourself.
You can spend hours focusing your mind, developing and nurturing a positive attitude, and working on your goals and your passion - only to have it wiped out in a few minutes by the company you keep.
Avoid negative people, avoid gossip; surrounding yourself with that kind of "group think" will be your downfall.
The following quote is good to remember:
"Great minds discuss ideas; Average minds discuss events; Small minds discuss people."
- Eleanor Roosevelt
visit "The T.A.D. Principle"