When I'm anxious I try to always drink sleepy time tea with valerian root. If you're at work camomile tea is one of many that won't knock you out. I carry a roll bottle of lavender oil that I rub under my nose for calming. They also make a spray you can spritz on your face. I only drink 1 to 2 cups of coffee in the am and no soda. I make iced green tea.