The final way to move within the scene is panning, moving your view up and down and right and left. It helps you look at different parts of the scene:
Move the cursor over the 3D View then push the Shift key. Press the middle mouse button (MMB) and move the mouse up and down.
Move the cursor over the 3D View then push the Shift key. Press the middle mouse button (MMB) and move the mouse left and right.
Move the cursor over the 3D View then push the Shift key. Press the middle mouse button (MMB) and move the mouse around as you like.