The Sudarshan Kriya is one that I first learned in James Nestors' book "Breath" I find it is grounding, as it brings awareness to the different lobes of the lungs. It may be a good kriya for those who find too much of head spin or have a hard time grounding with kaphalabhati or kundalini practices.

It is mainly rib breathing - diaphragmatic ujjayi with various arm positions, ending with three bursts of bhastrika at the end, buzzing bee breath, 3 AUMS.

Enjoy!