Here is a great video how one Catholic parish in America has renovated its church building, invigorated its parish life, helped its community, and is contributing to the restoration of the Church at large. The video is from 2010, but its message resonates still. Basic things: repair the building, offer vespers, bring back pomp and reverence, Latin, chant, Corpus Christi procession, altar boys, communion on the tongue while kneeling, incense, mystery, etc., etc. They also employed an architectural and liturgical expert, Denis McNamara, to help lead the restoration.
The church interior was completed in 2014. Here are some stunning images, including before and after photos of the project. What beauty. My parish should do this! I’m sure the first response will be about money, but I really think it comes down to the will to do it — as do most goals of highest value.
If there is any one formula or silver bullet for creating vibrant parishes it seems to be: get back to the roots, restore the old ways, focus on truth, goodness, and beauty in the Mass, and do those things that support these things, like renovating your church building inside and out.