I have always thought it would be a good idea to rationally take all the parts of religious and social societies and bring them together in a way that provides everything that religion provides without all the useless and bad ideas. Combine this with technology and you would have a hit.
That's what the Unitarian church is supposed to be, I think. I attended a few of their services out of curiosity, and they were similar to church services except there was no mention of religion. Instead of hymns there was classical and folk music, instead of bible readings there were readings from secular literature (Thoreau seemed to be a favorite), and so on. There was a lot of talk about self-improvement, doing volunteer work, etc.
Unitarian-Universalism is a big tent which includes both a (heterodox, from the perspective of mainstream Christianity, which is Trinitarian) branch of Christianity and a diverse array of non-Christian congregations.
Some time last year I read a bit of Religion for Atheists[0] which touched on some of the same contents. I came away with a certain sense of being condescended, but also some interesting ideas along these lines. If you haven't read it, it may be worth looking up at your local library.
I have always thought it would be a good idea to rationally take all the parts of religious and social societies and bring them together in a way that provides everything that religion provides without all the useless and bad ideas. Combine this with technology and you would have a hit.