Accountability can make you do some crazy things.
Two weeks ago, the church that meets in our home discussed accountability. In order to make it practical, I challenged everyone to try and pray with someone, preferably who doesn't know the Lord, during the week, and said that we would report back the next time we came together.
Big mistake! Having challenged everyone, I now needed to live up to it too. Since I live the life of a writer, most of my time is spent with just me and my computer. There was no obvious situation where I would come across someone new, so I brainstormed.
I put an ad on Craigslist. "Do you need prayer?": no response.
I responded to some tweets that said, "I need prayer" or "I need God": no response.
Finally, a couple of days before we were due to meet again, I received a sales call from someone at an online pet pharmacy. Our dogs needed some more flea and tick meds, so I placed my order. The lady at the other end was just saying goodbye when I interrupted her.
"Before you leave, is there anything I can pray for you. I believe that God answers prayer."
She broke down. She told me something I could pray about and I prayed for over the phone. It turned out she was a Christian. As we said goodbye, she said, "I'll never forget you!"
When our group came back together, everyone had a story of how they had deliberately prayed for someone. No one they approached had refused prayer; everyone was very grateful.
Would we have done it without the knowledge that we would be asked to report back? I don't think I would have done so. Accountability is a key tool in multiplication.
Practical activity: Give your group a challenge. Maybe challenge them to pray with someone, or to tell their story to a not-yet-believer. The important thing is that you follow up with it.