I have heard this question asked by leaders of denominations, pastors, and small groups: “What do I need to do to get my people living more missionally?”
As is almost always the case, change starts with the leaders first. It starts with repentance. Repentance means a change of mind that leads to a change of behavior. Here is what the Apostle Paul wrote about repentance—not to unbelievers, but to the church:
Yet now I am happy, not because you were made sorry, but because your sorrow led you to repentance. For you became sorrowful as God intended and so were not harmed in any way by us. Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death. See what this godly sorrow has produced in you: what earnestness, what eagerness to clear yourselves, what indignation, what alarm, what longing, what concern, what readiness to see justice done. –2 Corinthians 7:9-11
The first step is to repent that you and the leaders before you continue to persist in doing church without having people live like Jesus lived, demonstrating a compassion for the lost and the poor. The second step is starting to take personal steps in incarnational living and service. Free up one hour per week, then two hours per week, and serve.