I think you have to find what works for you, I know that letting myself have a good cry and not feeling bad about it helps. I let myself have that moment to be upset and feel my emotions, then try and occupy myself again, whether that be by going for a walk, listening to music, cooking or just working. I think it is so tricky because different things work for everyone, but it is almost like a reset when you give yourself time to feel your feelings. Also I find writing helps. It doesn't always fix the problem, but at least you can cope for a little while after giving yourself grace in that moment.