Remember to celebrate. For example, today you can celebrate International Pancake Day. That’s not something just dreamt up by the marketing department in a company that sells pancake mix. It comes from the Christian liturgy, where this day is called Shrove Tuesday and is the last day before the fasting period of Lent. Because you were not allowed fat and sugar during Lent, you had a feast on the day before where you used up all the good stuff, for example by making pancakes. This day is also called Mardi Gras (Fat Tuesday) for the same reason.
In times like these, it is important to find reasons to celebrate. If you don’t actively act against it, lockdowns and other bad news will affect your mood. But it is completely within your power to lift your spirit by deciding to celebrate something. Like pancake day.