My dearest friend Gualtiero Negrini sent me this picture of Alfredo Di Stefano, one of the greatest players ever, while he's shooting.
Aside from the elegance of his movement, 'class' is something you can't teach or learn, you can see that the right technique is still absolutely the same.
Eyes on the ball.
Flex the leg that holds your weight.
Flex and snap the knee of the leg that shoots.
Lock your ankle.
Please go to the page 'Learning Through Pictures' to better understand this concept.