I have added a video to the Resources page on Kokoro 心 Heart, about psychological first-aid.
The practice of psychological first-aid falls somewhere between acute and long-term self-care. It baffles me that I was nearly 40 before I had it pointed out to me that we need to treat psychological wounds as they happen, the same as we treat physical wounds.
Here is the video by Guy Winch, which was my introduction to this practice.