Here's a couple of great websites. The first has a lot of really thought-provoking material including this article on the significance of the words we use in congregational worship: http://thegospelcoalition.org/blogs/kevindeyoung/2009/11/04/why-so-many-words-in-worship/. I've recently discovered this site and its resources section with hundreds of free sermons by speakers including D.A. Carson, Wayne Grudem, Josh Harris, Paul Tripp and Tim Keller. They all come from a 'Reformed' standpoint but I think you'll find their passion for the Gospel and commitment to the Bible refreshing.
The other site is Bob Kauflin's 'Worship Matters'. Brilliant resource for worship leaders and worshipers in general.