Engage in behavior that will help you to constructively discharge your feelings. You might chose to write in your journal, exercise, make a phone call, scrub walls, etc. I would also add that parents who learn relaxation techniques such as progressive muscle relaxation and deep breathing become far more able to control their anger than those who have not. For many survivors, particularly those who grew up in families that lacked appropriate boundaries, physical and emotional closeness can be confusing and even frightening. It's not easy to establish proper boundaries as a parent when you didn't experience them as a child.
Many survivors tend to underestimate their strengths in regards to parenting.
It's important that you help them identify and build upon their skills and abilities. Just as you hope to teach parents how to best nurture and care for their offspring, the parents with whom you work need your encouragement and support. It's been said that the best teaching comes from example- by providing parents with positive feedback when ever possible, you not only encourage them to continue doing what works, you also model an important skill that children so desperately need from their parents. In honoring the parent, it can be possible to assist the parent in honoring his or her own child. I've left a tremendous amount unsaid.