Let the preacher speak to the contemporary needs of the boomer generations. Let his lessons incorporate the gospel. Let the preacher supply Bible remedies that help people so that they will believe they are getting something for their attendance. This can be done. For me this again is a negotiable area, as long as no compromising with gospel truths is done.
Boomers get the best for themselves and expect it from others.
They don't like junk. They don't like skimping. Again, I find this somewhat of a negotiable area. This is a tough one. They like praise songs sung to the accompaniment of electronic instruments of music as well as the regular instruments.