Prepare the backing tracks and click tracks for your set in your audio system. If you are using a CD player, insert the appropriate CD or CDs. If you are using a computer, queue the backing tracks in your preferred audio player.
Set the click track's output to one channel and the backing track's output to another, if using a click track. Send the click track signal only through to the performers, but send the backing track signal to, both, the performers and the audience.
Test the tracks with your live elements to adjust the mix between the backing tracks and what you are performing live. Ideally, the backing track blend seamlessly with the live elements. If using a click track, also test to be sure that the click track can be heard through the monitors but not through the house speakers.
Reset anything that is no longer in its proper place after checking the sound so that it is prepared for the actual performance. Save settings on the mix if you altered something.
Press "Play" on the backing track when ready to perform the song.