I came across a great 2 part article by Rick Warren on the effectiveness of Jesus’ ministry and how that relates to the worship environment created at your church for both believers and unbelievers. Here is the list in it’s short form:

1. Only believers can truly worship God. (I believe this - “truly” is key - John4-23-24)
2. You don’t need a building to worship God. (The success of various types of church plants all of the world is proof of this -as if you needed any)
3. There is no correct style of worship. (But everyone has particular taste even if “in spirit and truth” are the only prerequisites. What if we created environments that were eclectic collections of “styles?”)
4. While unbelievers can’t worship, they can watch believers worship. (I don’t like the phrase “can’t worship” because everyone always worships something. It is what they can and can’t truly worship that matters. I also believe this is point is only effective if #1 is taking place)
5. Worship is a powerful witness to unbelievers if God’s presence is felt and the message is understandable. (Yes!!!)
6. God expects us to be sensitive to the fears, hang-ups, and the needs of unbelievers when they are present in our worship services. (however, these people still know they are attending a church service so you don’t need to try to take that away from the equation)
7. Worship services do not have to be shallow to be evangelistic, and the message does not have to be compromised. It just has to be understandable. (Very good point. I understand the messages of SBC preachers that use big words they learned in seminary because I grew up in those churches and attended seminary. Many uneducated lost people I know lose the message in the educated jargon).
8. The needs of believers and unbelievers often overlap. (if you think about this for a second it is pretty deep - but very true)
9. It’s best to specialize your services according to purpose. (Yes!!!)
10. A service geared toward non-believers is meant to supplement personal evangelism, not replace it. (YES!!! Jesus went to people and people came to Him. He did not choose one or the other)
11. There is no standard way to design an evangelistic worship service. (this is a very hard thing for many to grasp)
12. It takes unselfish mature believers to offer an evangelistic worship service. This is the most important of all. (1 Corinthians 9:12)