First and foremost, make sure you are starting a regular bedtime routine. Every night, do the same thing at the same time. A bath can be relaxing and help signal to baby that it is time to get ready for sleep. Read a book, let the baby nurse or have a bottle, then it is time to go into the crib. With both of my kids we used a transitional object - a stuffed animal that went in the crib with them. If she is breastfeeding, your wife may want to sleep with the object for a few nights so it picks up her scent. Also, make sure the baby is getting enough to eat before bedtime whether she is getting formula or being breastfed. What I did when I was nursing my daughter was to feed her about an hour and a half before bedtime, give her a bath, read a book or two, then let her nurse again right before putting her in the crib. Usually she fell asleep at the breast which was fine by me. We also used a noise machine or fan in their rooms. My son, who is 5, still likes to fall asleep listening to the sound of the ocean.
We didn't use a pacifier with either child. My son would spit them across the room. My daughter would sometimes fall asleep with it in her mouth, but most of the time she played with it. There are studies that say a pacifier can cut the risk of SIDS, too. Really, I think it comes down to a personal decision for the parents. If you are both so inclined, try it out. If the baby takes to it, great! If not, well, you're only out a couple of bucks.
In my experience, this is usually just a phase. Especially if she is going through a growth spurt or about to hit a developmental milestone. Some people would say enjoy this while it lasts because soon she'll be pushing you away when you go to hug her. Other people would tell you to be firm and not give in to the baby "manipulating" you into getting what she wants. If she was a little older, I'd be more inclined to say let her cry for a while. I think at 2 months old, she's still a little young for that. Make sure she's not too warm or too chilly. Try swaddling her. Maybe try letting her sleep in a swing (some babies really like it, though mine both hated the swing with a passion). Don't do anything too stimulating right before bedtime.
I can't think of much more. I hope I gave you some useful ideas.