Resentments Have Roots in Expectations

In principle, when we have expectations of others that don't pan out it often leads to resentment, which often leads to brewing discontent or bubbling-over conflict. I have heard, “expectations are planned resentments.” The surest way to avoid resentment is to not have expectations. When I fall into a victim role it is helpful to remember that rarely am I a victim of others and often I am a victim of my own expectations.
Practical Tip: As a participant in good group decisions, try hard not to develop false expectations. Expect from people ONLY that to which they have specifically agreed, and even then keep in mind that most people are not capable of doing all that they agree to. Focus on the good things that your group and the people in it have done, and what they could do, rather than what they should do according to your expectations.