Some work wonders for some babies some of the time. Other babies are more challenging, and refuse to be soothed by what might work for some babies. Never underestimate the power of burping for some babies. Crying and fussing leads to swallowed air. A good burp after a crying spell can do wonders.
Swings are great for some.
A warm pack on the tummy can be very soothing. Put a radio next to the baby's crib, set between stations for static. You can even turn on a vacuum cleaner and leave it running under the crib. Reserve actual rides for when you're at the end of your rope. You can also duct-tape a car seat to a clothes dryer.