There are 7 ways, most anesthesiologist do 99%+ with the metal flashlight method.
A good anes. Will be skilled in at least 3 or 4, doing 2-4 of each type each month (ask!). The light wand is the quickest, least traumatic, and easiest but many never do it. The flashlight (larygnosope) has the highest success rate. All methods have a failure rate. Thus one should be expert at several methods.