@Karma keep an eye on the forum, other topics & ideas for the solstice & Sabbat will start popping up as we continue to get closer.
In the Northern Hemisphere we will have Litha & the Southern Hemisphere is Yule.
Litha Altars, Ritual Ideas + Midsummer FAQ 
How to Celebrate Litha Alone: Ideas for a Pagan Summer Solstice!
How to Celebrate Yule Alone? Ideas+Ritual!