Start putting strategies in place to destress (whether that's regular meditation, exercise, ect).
Pick (at least) one day a week where you commit to being fully present with your family/yourself and work up the discipline to hold yourself to that committment. (In other words, one day a week where you let go of CASA stuff.)
It is okay (and IMO essential) that you seek and strengthen your capacity to control (or at least temporarily compartmentalize) your emotions. You will not be able to save all the children. The judge will not always listen to you. You may find that you made a mistake in perception. You will have some people lash out at you in their pain and anger. You may be in a situation where everyone is pissed at you (hopefully not often). It's good to develop emotional armor and professional "face" for those hopefully rare instances. Whatever you have to say, there will probably always be one person who doesn't want to hear it.
Keep in mind that compassion while seeking clarity is messy and painful. Yet unless you're willing to truly open your eyes to all sides, you will not be serving the best interests of the child. At the same time, the suffering you will bear witness to on *all parties'* parts will make it essential to have the first three things I listed above.
I don't mean this to be a downer. You may find that doing this work is extremely invigorating and life-affirming and exciting (while at the same time feeling weird about that because of the nature of it). But as someone who survived and thrived in the social workish trenches, and saw a lot of people burn out around me, these are the strategies that allowed me to do it without burning out and still have kept my capacity and desire to do it in the future intact. I was very lucky had had a couple of strong mentors who told me a lot of things as a noob that *I* did not particularly want to hear but who made it possible for me to do an excellent job until *I* was ready to quit so I could SAHM and not because I was fried to a crisp. If you find such a mentor, move heaven and earth to maintain that relationship.
