One quick tip is to have a picture of your child in front of you as you advocate, whether the advocacy is in person or remote.
Whenever I go into important negotiations, I create a vision board with images of my goal, a few mantras, and look at it while ruminating on the approach I'll take. I often draft an outline of the strategy I'll take, rehearse it the night before (or for several days!), and do a visualization the morning of the negotiation of myself acting out the strategy successfully, focusing on how I feel. This helps keep me grounded in negotiations, attuned to my inner state, and focused on concrete actions I can take to support achieving my goal. Usually in the lead-up to the meeting, I'll listen to a few loud heavy metal songs to get psyched up.
