A very effective way to remain calm and at peace is through Meditation. When you can drop into a theta brainwave state at will, emotions are disconnected. You are calm, cool, and collected no matter what. It makes things easier to think, make good decisions, and not go into fear. You can also come out of it at will and be as upset or depressed as you feel you want to be. It becomes a choice, not a reaction to circumstance.
I also have some fabulous products that use energy healing and aromatherapy that help people thrive and/or remain at peace when faced with chaos and uncertainty.
Probably the best one for that is Inner Peace. We call it the stress buster: