Count to 10 (or 200) when things go wonky and you need to refocus. Seriously, when you count, the NON-emotional side of your brain kicks in and helps distract you from - I'm going nuts and may end up on the 10 most wanted list if my sister, aunt, neighbor (you fill in the blank) doesn't stop screaming, crowding, being nosy (yep, you fill in the blank).
This is not to say that if there is a real issue it should be swept under the counting run, but more so than not, when we are stressed it is more emotion, adrenalin and other stressors that are causing the "issue" than a real "ISSUE"
Take a deep breath and count. Even count out loud. I recommend singing your numbers to Old McDonald or if you are really mad, sing your number to the tune of Wrecking Ball. Ms. Cyrus won't mind.
When everyone goes home, back to work and school, you may realize it was all just a big ball of hormones, lack of sleep, and out of whack holiday expectations.
Counting can keep you off the 10 most wanted list and the wrecking ball.