well ya posture like if you tend to hunch over, standing up straight makes you taller by like an inch or two, and if you still young streching is good for you, as a matter of fact there's a book i seen i forgot what it was called, some shit about how to grow taller, it guarantees that you will grow up to 2-4 inches, just go to google if you really wanna find out, but that's all i really know