This is an idea I came up with when I checked out a website about photography and compositing (http://gizmodo.com/5965219/these-awesome-photoshops-are-perfect-because-they-were-well-planned/)

Took two or more photographs of yourself on one location. You must not change the position of the camera and take care that the light does not change either. Use a photo editing software to arrange yourself two or more times on the same location. You may use masks and layers or simply the selection tool and the paste command. It may be helpful if you have already experience with photo editing.