Stretch, every day for at least 10 minutes. Eat healthy. Get Sleep. Swim. Ride a bike with the seat at an uncomfortable height. Practice perfect posture ALL the time.
Look up the "super cobra" stretch.
You are .5 inches taller in the morning, remember that.
Edit: This wont make you "taller" but in fact, it will better align your spine and you will maximize your height. People's bad postures lead them to appear shorter than they actually am. For example. I am closer to 5'11 when I stand up straight, but as I type this now I am slouched in a non supportive computer chair, so I am around 5'10ish.
Btw, if this is for a girlfriend thing. My good friend on the wrestling team is 5'7 and has serious confidence in himself and thats what girls like.