As Blender only renders what the camera sees, it's useful to be able to point the camera on what you are working. The steps are as follows:
Use the keys on the NumPad to move your view to an angle that you like.
Press the Ctrl key, the Alt key, and the 0 key on the NumPad at the same time to make the camera match the view you had of the scene.
Press the 0 key on the NumPad to get the Camera view.