Bring Together ten Jews if posible Talmidei Chachamim (Torah Scholoars). They should all accept on themselves a fast and to go to the Mikve. Together they will read and pray all sefer Tehillim.
There is a certain extra prayer that is called Shiva Kor tay Brit, which is similar to that of the ushpizin of Sukkot.
The 10 men will go around the bima 7 times and say special prayers with special kabbalistic meditations.
This Tikkun is done in many places and is an age-old custom.
That in itself is a big thing and can bring salvations.