How many have a child who uses pacifier and how did you get the child to quit it?

when my daughter was younger i started using the pacifier and now she is 20 months and so attached to it. i am trying to get rid of it but she asks for it all the time and would scream up a storm if she can't find one. Before she only used it before bedtime and once in a while before a nap. now all the time she asks for it and screams until she gets it. How did you get your child to stop using it. I was going to wait until she turns 2 years. I want to know different techniques that worked for other people.