You will begin to really feel like a part of God's family. Most people say that the close relationships that develop in a small group is the greatest benefit of being in one.
Prayer becomes more meaningful.
You will handle stress and pressures of life better. These actually become support groups in times of crisis, change, and loss. You will have a natural way to share Christ with unbelieving friends and work associates. You will develop skills you never knew you had. You will deepen your understanding of worship.