Rule Of Thirds:

Rule of Thirds is a guideline followed in order to attain a cinematically pleasing shot, or picture. It refers to a 9 sectioned grid, and according to the Rule of Thirds, the subject should be placed either on the right or left vertical line of the grid, leaving the other two thirds of the image more open. In landscapes, for example, 2 portions can be given to the sky, and one to the sea or land.