With everything you do. Write a love letter, make someone something sweet, show up with a boombox outside someone's window blasting In Your Eyes, buy someone flowers, do something meaningful, go on a spontaneous trip with someone, tell someone you are thinking about them, look at yourself in the mirror and tell yourself how wonderful you think you are, read a poem, get lost on the dancefloor, listen to a good song, smile at something tender, listen to Sleepy Lagoon by the platters...the possibilities are endless, you should try it sometime...