Here is an opening prayer of invocation from Tim Graves. It was posted on his LiturgyBits blog.
make your presence known in this room.
Move about the pews,
between each of us,
pausing in the heart of each of us.
Remind us that all of us here and beyond are your beloved,
created in your image.
We are your people,
holding your essence within us.
Help us to connect with you and with one another
during this time of worship. Amen.