How many people screw in a light bulb by turning off the light, screwing in
the bulb in tight and turning on the light?

This, according to my electrician, is the wrong way.

Apparently, the correct way to screw in a light bulb is to keep power to the
socket on and screw the light only until it lights up. This prevents the
contact in the base of the socket from getting crushed which makes it harder
to get contact with each subsequent bulb.

Joe