Tip #2 focuses on getting help during the Holidays. There is no shame in getting help.
If you gave yourself an 9 or 10 (see tip #1) on intensity and it seems as if it never goes away and if you have found now way to move through it (can barely function, can’t get out of bed, can’t eat, can’t sleep, think of harming yourself, etc.) please consider external help during the Holiday Season.
You may want to contact your medical doctor for medication to see you through the Holiday Season. You may call a therapist and say, “I’m having a difficult coping, I want to see you a couple times a week during the Holidays, so I can manage to hold myself together.”
There is nothing wrong with temporarily leaning on something that will offer relief and give you a better chance of finding some joy in the season.