Please read this blog post on mystic MAMA as I think it covers the topc & gives some great inspiration for rituals!
..."Dearest Light*beings! Namaste~the *Light* in me honors the *Light* in youOn the Solstice, we honor the Light, we remember the Light, we celebrate the Light.These seasonal turning points remind us of the essential, the elemental…wherein lies our planetary unity. Whether we welcome Summer in the Northern hem or Winter in the Southern hem, we enter a new cycle. We cross over a new threshold."