In my practice, I use chants all the time as part of a daily devotional. The following are common ones and others I have written for my practice.
Goddess Chant: Isis, Astarte, Diana, Hecate, Demeter, Kali, Inanna.
Elemental Chant: Earth my body, Water my blood, Air my breath, and Fire my Spirit.
Moon Chant: Luna Luna Luna Diana, Luna Luna Luna Diana, Bless Me Bless Me Bless Me Diana, Luna Luna Luna Diana.
Sun Chant: Bright Bel, Beloved Bel, Brave Bel, Blessing Bel.
Other great ones can be found at this page: http://www.angelfire.com/nc/tigerheart/Chants.html