What are the causes of having a 'vulture neck' ie. a neck in an S shape that looks like's a vulture's neck, going out from the shoulders then upwards to the head? I've heard it's something to do with pillows? How do you iron out the kink and make your neck straight again if you have this condition (not with an iron, obviously)?
The problem has to do with stress, bad habits of bad posture, and or tension. The best way to solve this I think is with Yoga, Cranio-Sacral therapy, and/or Rolfing.
Look in your library for books on the Alexander Teqhnique. They are unlikley to give you a complete knowhow and its most effective when administered buy a trained practitioner but they may give you some initial guidance to good posture and an idea of wether the method is what your looking for. Warning! It can be expensive.