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