Show people you care for them by listening to what they have to say. Active listening is about making space for only that without trying to respond to whatever they are saying.

Make someone's day at the restaurant or grocery shop or super market, by rewarding them for a spectacular service, by tipping more than you normally would.

Practice the act made famous by one of the most influential movies of the last decade-Jadoo ki jhappi (Magical hug in Hindi). When you hug someone you are relieving stress for both people.

Gift someone a book or send an article which reminded you of them

Writing letters which convey genuine positive emotions can be rewarding in terms of health for both the sender and receiver. The fact that it makes the recieved feel good is a bonus.