Caroline/Hestia.
Many years of practice. My job. I've been working with curses and wards since even before graduation, and I did graduate 20 years before you. Mostly it involves assigning myself a time and space in the near future when I can safely deal with my emotions and riding it out until then. And taking things one day at a time when I'm not required to think in the long term. Dwelling on the rest of the war the whole time is enough to send anyone hiding under the covers, but telling myself that I just have to be strong for the next few hours, and then I can rest, is doable.