Try tulsi tea!
Tulsi is an amazing herb in that it has the intelligence to determine what you need in the nervous system, and provide it (adaptogen). In this way, it can help stimulate the nervous system, while not overdoing it like caffeine. In addition, tulsi is a great herb for the digestive system, antimicrobial and helps to rid the body of toxins and bring out mucous from the lungs. (Nervine Stimulant; Anthelmintic; Antimicrobial; Diaphoretic; Dipana; Expectorant)
I’ve been drinking Organic India’s Tulsi Rose, and it is heavenly. You can find it at Vitamin City on Palo Verde/Spring if you are in Long Beach.