If you have neck pain you may consider investing in a memory foam pillow. You want your pillow to contour to your head and neck and promote spinal alignment. You should take into consideration whether you’re a side, back, or belly sleeper. If you sleep on your side you want a harder pillow. Back sleepers need a medium-firm pillow to support your spine. And if you’re a belly sleeper you want a thin pillow to prevent overextending your neck.