Strengthen the Lower Trapezius, combined with a squat.  Be careful to keep the neck soft and avoid over extending it.  The lower portion of the trapezius holds the head up.  Keep it strong and you can prevent a lot of neck pain. 
You select the weight, Lance is using a 5kg ball.
Back extensions - exhale as you rise up.  Keep the neck soft and do not hyperextend (arch backward). You can anchor your feet against a wall or rest on your knees as your start position over a smaller ball and you won't need someone to brace your ankles. Paraspinal and a little Gluteus Maximus.
Sidebend over a ball, with feet anchored against a wall.  You will strengthen the Quadratus Lumborum, Tensor Fascia Lata and (to a lesser degree) the Abdominal Obliques (Transversalis).  This move is using the tensor in its functional capacity as a pelvic stabilizer and the quadratus in its capacity as a mobilizer.