Tulsi

Tulsi (meaning "incomparable") is highly revered in Ayurveda and Tulsi extract has been used in Ayurvedic medicines for thousands of years. Tulsi is high in antioxidants and offers many health benefits. It is also known to build immunity and relieve stress.

Tulsi tea is easy to make and is a excellent pick-me-upper.
Just make your tea the way you like it (strong , light or black) and add 1-2 drops of Tulsi extract to it. Tulsi goes well with milk too.

On days when you feel stressed out, try having a cup of Tulsi tea.