It's incredible to me that all of the discomfort that I feel can be corrected by eating something, or by drinking a great big glass of water. But if I do not connect the dots, and do not understand what is going on with me, my restlessness can utterly overtake me such that I snap. Keeping a tab on my blood sugar and caffeine levels is a must if I want to feel calm.
I don't go too long without eating or over-drink coffee. I maintain a healthy blood sugar balance so that I can remain steady emotionally no matter what life throws at me.