Recently my parish has been blessed by God with growth. I believe that one of the things that has contributed to this has been simplifying the service.
When I arrived the liturgical state of the parish was the same as when I had left four or five years earlier. It was a typical APA "missal" parish, meaning of course that the 1928 Prayer Book liturgy was supplemented by all sorts of additional devotions and responses from the missal. That, along with six hymns, service music, announcements, a sermon, and the "three year lectionary" made for a very long and (for newcomers) confusing service. While that service may work well in some places it just did not seem to be doing anything for us here.
So I decided to do something radical: we went to a straight 1928 Prayer Book Service. Additionally, I took out the sermon hymn, a practice I began in Virginia which saves about five minutes from the service. I also brutally suppressed the long rambling list of "Mass Intentions" before the Prayer for the Church. All of this has made the service much easier to follow and a lot less intimidating for visitors. (In my opinion it is much more aesthetically pleasing as well, although I am something of a minimalist in my artistic tastes.)
It is now very easy to just give a newcomer the Prayer Book and tell him: "Put your finger here for the scripture readings, and here for the service." Often they do fine the very first time they visit, and most of the time, happily, they stay, or at least visit on a regular basis. No longer do they have to bounce between three books, or listen to a long, confusing explanation of how we are 1928 BCP parish that for some reason has all of this stuff in the service not found in the liturgy. And no longer are there those awful "service booklets" in the pews, which invariably look terrible, and are usually nothing more than monuments to a priest's idiosyncrasies.
I believe that making the liturgy more accessible in this way has helped make people feel more welcome and at ease in church. The Prayer Book liturgy is daunting for those who are new to it. We clergy sometimes forget this because we are so used to it. We err in my judgement, and reduce our effectiveness and outreach, when we take this beautiful, but very prolix liturgy, and add a lot of extra stuff to it.... stuff that is really unnecessary.