Preferred sleeping positions are often set early in life and can be tough to change. Two sleeping positions are easiest on the neck: on your side or on your back.
If you sleep on your back, choose a rounded pillow to support the natural curve of your neck, with a flatter pillow to cushion your head.
Feather pillows easily conform to the shape of the neck but they collapse over time, however, they should be replaced every year.
When riding in a plane, train, or car, or even just reclining to watch TV, a horse shoe-shaped pillow can support your neck and prevent your head from dropping to one side if you sleep off.
If the pillow is too large behind the neck, however, it will force your head forward.
If you sleep on your side, keep your spine straight by using a pillow that is higher under your neck than your head.