I've read a theory (don't ask where, I'm absolutely absent-minded atm) that having a pacifier all-day-round stops baby from practicing sounds that will later be used in speach. For that reason, they recommended to use pacifier for a few months only. (On the other hand, only a few kids have a severe speach delay, I imagine, and probably not because of the dummies they had... so I'd say all is relative).
I've also read about introducing alternative soothing methods, like comfort blanket or age-appropriate toy (that was from some Montessori book, I remember that). Idea was to give baby a choice of a couple of toys/comforters in their crib/cot and at some point one will be chosen and you will not need a pacifier. (I also read that it might be a good idea to have a spare copy if you take them out of the house).
And yes, another thing that was already mentioned, was to try not to use pacifiers before lactation is established.
Saying all that, I'll be a FTM and time will show if I'll use any of what I just wrote.