What is the best and easiest way to change the headlight bulb?

 

I personally like to use my hands...
Some people use their feet, but that doesn't seem to work so well for me.
I tried using my tongue once, but that didn't taste good.
This is one one of those personal levels of comfort questions, sort like the military's don't ask, don't tell policy.

Or maybe you could trying telling us what type of bike you have (for a starter) and what exactly you are looking to do...

sheesh...

 

Remove the trim ring, remove the screws that hold the headlamp retainer ring to the adjusting bracket, pull the headlamp out some, unplug the three prong plug which puts the headlamp in your hands. Put it on your work bench and remove the screws holding the securing wire in place. Pull out the old bulb, insert new bulb and reassemble in the reverse order. This is the procedure on a SG, your bike may be slightly different.