Not to try and sound hyper spiritual, but I try and phase everyone out, during worship service. I try and focus on the fact that God is in the place, and inside of me communing with my spirit. I then listen to feel the pulse of the song. I keep glancing at the head musician, to see if he is giving signals. The congregation sometimes (depending on where you are at, can be a hinderance.) Some of the most awesome experiences I have with playing has happened during Friday Night rehearsal, when the musicians and singers, were totally focused totally on God, some of these experiences have carried over to Sunday Morning.
That said, this is just me, not meaning to cause ripples or waves, but as worship leaders, the people are supposed to react to us, not visa versa. So if our focus is playing unto God, no matter what notes, progressions, or riffs, we run. The Spirit of God, will lead the people into worship.
Peace all.