Do you find yourself saying "yes" when you're really thinking, "oh, no?" And then you find yourself asking, "Why did I do that? Why did I automatically say yes? Why didn't I just say no?" Well, saying yes when you are really thinking, "forget it!" is often the basis for avoiding conflict, which can quickly go from a conscious reaction to an automatic habit that can quickly spiral out of control. Of course, when others discover your willingness to say yes, they will naturally go to you when they are in need of a person who will do their bidding, leaving you inundated with frustration and resentment. So, take a moment and listen to your desire to avoid conflict in general, the root of the "automatic yes." You may find that your decision to say yes or no is then pulled back into the conscious part of the brain that can analyze what is best for you in that moment. 

-Dr. Peg Abernathy, Self-Full Life Affirmations