Swaddle and bounce
Imitating life in the womb seems to be most effective.
Tightly swaddle & then hold the baby over your forearm, tummy down, while gently bouncing & walking around, all the while "shooshing". The "shhhh" sound is a universal calming noise in all cultures. (We think it mimics the sound of blood rushing by in the womb.) Bounce & shoosh at a level to match baby's intensity (go softer as they calm.)