Wait to grow naturally over time. If you do all of the previous steps, there's a good chance that you've given your body the best chance to grow taller. Not everyone is going to be as tall as a basketball player or a model. Being tall isn't everything, so learn to be comfortable with how you are.
Some people are "late bloomers" and only hit their big growth spurt when they turn 17, 18 or beyond.
If you are really concerned, see your pediatric endocrinologist. This doctor will be able to give you valuable information about possible medical courses you may take in order to combat low growth.