How much new stuff should my church sing? How much older content? What makes for a good balance?
There is a lot to like about Jamie Brown's recommendation: "Think in thirds." He recommends that, over time, your congregation's sung worship choices should roughly even out at about one-third Ancient songs (of which he includes 17th - 19th century hymnody), about one-third proven favorites from across the worship renewal movement of the last 50 years, and about one-third new content from today.
It's a helpful post to get us thinking.