Radiography is not necessary if the patient satisfies ALL of the following low risk criteria:
No midline<unk>  tenderness
No focal neuro deficits
Normal alertness
No intoxication
No painful distracting injury
C-spine imaging should be considered unless the patient meets all of the above low risk criteria 
Age >65
Dangerous mechanism (fall>3ft/5 stairs, high speed MVC (>60mph)/rollover/ejection, bicycle crash, RV, axial load injury)
Parasthesias in extremities
Simple rear end MVC
Delayed onset of pain
Sitting position in ED
Ambulatory at any time
Absence of midline C-spine tenderness
Rotates neck 45 degrees to left and right
C-spine can be cleared clinically if above criteria met
Cervical spine clearance
Canadian cervical spine rule
Trifascicular Block
Nasal intubation
Advanced airway adjuncts
Thumb spica splint
NEXUS cervical spine rule
Awake intubation