It works!

Just watched "The Happiest Baby on the Block" DVD from Harvey Karp, M.D. He's a pediatrician/child development expert and the DVD is about discovering the "calming reflex...'off-switch' to crying; 'on switch' to sleep". My girls aren't typically criers, so I waited until they did & tried his 5 steps to calming crying babies. They were asleep in no time.
1)S - Swaddle(tight with arms down so they can't wiggle out)
2)S - Side/or stomach (while holding them, turn them over in a comfortable position)
3)S - SHHHHHHH! (over their cries, loudly in their ear. In the womb, they were used to constant sound that was louder than a vacuum)
4)S - Swing (while still in their comfortable position, rock them back & forth on your legs allowing their head to jiggle slightly)
5)S - Sucking (pacify them as you do all of the above)
By doing these things, you're recreating a womb environment. It's pretty amazing how quickly my girls calmed down & went to sleep.