When DD is really upset, I hold her tight in my arms and gently bob up and down fast which kinda mimicks how it would have felt her being in the womb if that makes sense? And I go "sssh ssh ssh, ssh ssh ssh etc" in a rhythmic tone if that makes sense.... she usually calms down pretty quick with that.

If she's in her cot and needs settling but not picking up... I stroke her nose and forehead and she closes her eyes that way and i rub her tummy... she loves that. I whisper in her ear and tell her I love her very much and will see her when she wakes up.