Mainstream press is full of ideas to keep us sane when we add a holiday to the stress of living in a pandemic for the better part of two years. Some of the ideas are mainstream, but one is quirky enough that you might enjoy giving it a try.

Take a set period every day to do things that you personally enjoy. You can set your own time limit - even 15 minutes of painting or playing the piano will help.
Chat with supportive people - in person if possible, but online if that is the only option. Strengthen those bonds and avoid people who weaken them.
Find moments for optimism - even among those that contrast with them.
In contrast, give yourself permission to feel stressed when it happens and is real. You don’t have to feel guilty about your feelings. The good thing is that feelings come and go.
One place near the door for everything you need when going out is a big help. Mask, umbrella, keys, purse, credit cards - seeing the items will remind you to take just what you need and make the load lighter.
Organize your fridge. Wasted food makes us feel guilty as well as costing us money. A Lazy Susan is a good device. So are glass containers that stack so you can see what is inside them. A whiteboard can remind you of what is left over. A generic shopping list pinned to the door means you can circle items for the next trip.
Do a short workout - seven minutes will refresh you. Call it an exercise snack.
Maybe you do all those things already. But here is something different. Watch Jellyfish: