How to make a dentist visit go by faster !?

I'm going to get a cavity filled soon and i HATE going to the dentist ! Just the smell, when you walk in, drives me crazy ! Anyways, what are some things i can do to make the time go by faster !? I remember since i was little, laying in the dentist chair thinking, "why don't they just install a tv on the ceiling or smiting !?" that would be great. but like any little games to play in my head or something?