-Choose songs that are both biblically accurate and musically accessible to your congregation.
-Don't fall in love with picking songs that are heavy on hype/excitement but light on lyrical content... Undignified, Every Move I Make, etc.
-If worship is primarily declaring God's worth, sing songs that objectively speak about God.
-Stifle neither truth nor emotion (spirit and in truth - John 4), which generally happens when drifting to the extreme with either.
-Don't impoverish your congregation by singing only old songs or only new songs.
-Don't treat the worship service like a concert, part of the priesthood of believers is that all believers are part of that OT Levitical choir now.
-Playing skillfully is commended in Psalm 33, so practice so as to acquire this proficiency.
just a few