Rescue Remedy. I've been experimenting with Bach Flower Remedies for the last couple of months for various things (more on that later) and I feel they are working for me. Formulas get very specific, but for the holidays and general trauma, Rescue Remedy can be beneficial.
Developed in the 1930's by England's Dr. Bach, Rescue Remedy is a blend of flower essences said to restore inner balance and change vibrations. I encountered Bach's Flower remedies many years ago in London, where it seemed to me everyone was familiar with it. It's the most common flower remedy, and a combination of five remedies--Rock Rose (for panic), Impatiens (irritability), Clematis (focus), and Star of Bethlehem (shock) and Cherry Plum (irrationality). You just take a couple of drops, or sprays, or even eat a blackberry pastille that is infused with it (perfect for flying).
Rescue Remedy is safe for children and animals too. They do make a children specific Rescue Remedy for Kids. This is great for travel, and any situation where there may be an elevated sense of anxiety.