Christian musician Steve Camp (who happens to be Reformed) has posted an interesting article series at his Web site entitled The Worship Driven Life. In Part One he writes about doctrine in worship and worship being on the downgrade (borrowing a term from the days of Spurgeon). In Part Two he writes about what constitutes genuine, authentic, Biblical worship. He focuses primarily on what worship is not and will turn to what worship truly needs to be in next week’s article.
The series is updated on a weekly basis with new articles posted on Thursdays. His site has some other excellent resources and it is worth browsing through (this is a good place to start).