Note: It is highly recommended to have a mouse with left-click, middle and right-click buttons, and a scroll wheel (that has center click capabilities).

Zoom All: This will show all the objects from the front as the models have been created - it can be used if the view becomes disoriented.
Within the 3D View window right-click the mouse and select Zoom > Zoom All.
Or, select the 3D ribbon > Zoom panel > Zoom All.

Rotate: Hold left click at a point in the 3D View that you want to rotate about, then release the mouse. Preferably the mouse is on the model when it is performed so the 3D View rotates, otherwise it orbits.

Zoom: Scroll the mouse wheel forward to zoom in and backward to zoom out. Preferably the left click is on the model when it is performed so the 3D View rotates, otherwise it orbits.

Pan: Hold down the mouse wheel and move the mouse left, right, up and down.

Visual Indicator / View Cube: Left click on corners, edges or faces on the cube and the view will rotate to that viewpoint, or hold down the left mouse button on the circle to rotate.

Select / Deselect one 3D Object: Left click to select one 3D object. Left click on the selected 3D object to deselect.

Deselect All: Esc key