No pacifier? Use your pinky!
Jon of FamilyResource.com reminded me about something I often did when my kids were newborns:
There are bound to be times when Mom isn't there to nurse, the formula isn't ready, or you can't find the pacifier. One way to soothe your hungry baby is to use your pinky. After you wash your hands, turn one of your hands so your palm is facing up, and then insert the end of your pinky into their mouth. This has worked for both of my children, and will usually pacify them for several minutes.
(This is one of several hundred reasons to keep your nails clipped short after you become a parent.)