Here is a list of songs that you can use as an invocation/call to worship at the beginning of your worship service.

Mission Praise The Source
All hail King Jesus 11 5
As I come into your presence 974 26
As we are gathered 38 29
Be Still 50 47
Be Still and Know 48 48
Blessed be the name of the Lord 1035 53
Change my heart, O God 69 68
Closer to you, Lord, and closer Still 815
Come, let us bow down and worship 91 BK 2 661
Father in heaven, how we love you 135 96
He is exalted 217 156
I love you Lord 287 214
I cast all my cares upon you
Jesus, name above all names 375 291
Jesus, take me as I am 382 297
Jesus, we enthrone you 388 300
O Come, Let us adore Him 490
Praise God from whom all blessings flow 557 432
Set my Spirit Free 595
Spirit of the Living God 612/613 462/463
This is the air I breathe 1119 BK 2 1007
Turn your eyes upon Jesus 712 533
We are standing on Holy ground 1121

In his time
Open our Eyes

All the songs that are listed above can be found in either the Mission Praise or The Source. The Source has at least three volumes and the numbers above are listed from Book 1, unless otherwise stated. Also if you have any suggestions regarding songs that can be added just drop me a line.