Below is a verse (Acts 1:8) that I believe applies today to how we approach being a part of building the Kingdom of God.
Acts 1:8
8 But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
The apostles were told that they were going to be witnesses starting in Jerusalem, then moving out into the region of Judaea, then further out into Samaria, and finally out to the far reaches of the earth. This verse has a geographic application as well as a cultural application.
Jerusalem was where the Church was planted. Judaea was the surrounding region of smaller towns and like minded people. Samaria would have been the next step in moving out of the local region and also evangelizing another people group. The same plan that began in Samaria would then be used to evangelize people groups from around the world.
The way we have applied this scripture to our family is that we try to have a three part approach to the Great Commission. We are first of all preaching the Gospel in our local community. The church which we attend is a Bible centered local gathering of believers where our family can share the Gospel and make an impact on our community. In choosing a church we wanted to strike the balance of faithfulness to the scriptures and close enough to home to impact the community for Christ. The second part of this approach to the Great Commission is to be involved regionally. We try to support like minded believers in other areas and also try to support some larger ministries which are a part of building the Kingdom of God. The third part of this approach to the Great Commission is our family has an international ministry. We work with a pastor in New Delhi, India who is having a great impact in the slums of New Delhi. We support a school for the least of the least and also fund an orphanage home focused on protecting young girls who are in danger of being sold into slavery or prostitution.
This plan is based on the scriptures and will help to focus any family or church on kingdom building.