Tom Wadsworth, in a recent podcast, ran through his 9 points for change to echo the NT church in our modern practice.
Also see his full lecture on this.
I've added my comments here and there.
1. Change terminology.
'Worship services/time/pastor...order of worship, etc' That language is foreign to the NT. Paul sets out the core of worship in Romans 12:1, 2. But let's also use NT terminology for our gatherings/assemblies: gathering/ecclesea, assembly.
2. Make edification the purpose of our church gatherings: 'one anothering' each other.
Make edification the purpose of joining a church gathering. That is, to build up one another. Nor by the 'man at the front', but 'one-anothering' each other. No longer a consumer, but a maker (jointly).
3. Less concert more content.
'Worship' and 'worship music/bands/pastors' has come to dominate modern gatherings; and music made to mimic the entertainment attraction of a pop-concert. This is far from the 'one-another' songs mentioned in the NT.
4. More speakers, shorter speeches.
Not just one person doing the talking, but many do so; but in an orderly manner.
5. More dialogue, less monologue.
Conversations about living the faith, not lectures that amble around a single verse. The latter is for the teaching/study group (adult 'Sunday school').
6. Break big groups into small groups.
Up to about a dozen people. More than this imposes a limitation on individual participation and salience. This is where disciples are made and maturity is achieved. Without this, people are probably not growing and have no place to 'grow'.
7. Create edification 'rooms'.
The church I recently served at purchased, converted and extended a cottage for meeting rooms. One of them, and one in the older building, were fitted out like domestic sitting rooms, with sofas, easy chairs, coffee table, standard lamps. Not like office meeting/lecture rooms (which the others were), but homes.
Not only did young people relax more in them and feel at ease, but so too did adults.
In larger rooms, seating might be set out to allow people to see each other: in arcs if not full circles.
But also, let's really drop the usage 'church' when we refer to our
buildings. In my church, apparently as one of the appointed ministers
(that is, elected, but not paid) pointed out to me, the place where we
gather on Sundays is 'The Church', not, as I had referred to it in a
document as: "the main hall. Sheesh!!
8. Incorporate the meal: the Last Supper was a meal, not a shot of wine and a cracker.
Include full meals in the life of the church and use these to remember the Last Supper. Eating together brings people together: relaxed. But, be sure that talk about Christian life and concerns is the major conversation focus.
And 'shot' of wine? Who ever heard of such a thing!
9. Make love an assembly mandate (I Cor. 13).
Paul's discourse on love is in the context of assemblies! When the church comes together, with many speaking, etc. love is essential to trust in this as the way of the church, from which all learn and are known to each other.