At the end of the rich young ruler episode, after Jesus had explained to the man that he was to give up his wealth in order to enter the kingdom, we get this passage in Luke 18:26-30:
26 Those who heard this asked, ?Who then can be saved?? 27 Jesus replied, ?What is impossible with men is possible with God.? 28 Peter said to him, ?We have left all we had to follow you!? 29 ?I tell you the truth,? Jesus said to them, ?no one who has left home or wife or brothers or parents or children for the sake of the kingdom of God 30 will fail to receive many times as much in this age and, in the age to come, eternal life.?

Two major points:
1. Following Jesus entails surrender of all (heart, soul, mind, strength [resources, including possessions]) to Jesus.
2. Those who follow Jesus like this will be blessed both now and in the Age to Come.
Now a few more observations:
3. Kingdom here is connected to a future kingdom — I would see a connection to “the age to come, eternal life” more than just to “in this age.” It is entirely reasonable, though, to see kingdom as referring to both the “in this age” and the “Age to Come.”
4. Surrender to Jesus leads to compensation in this world — in the company of Jesus’ other followers.
5. This text must be connected to Mark 3:31-35, the reconstitution of God’s people in a circle around Jesus, and it is reasonable then to connect the dots with Acts 2:42-47, Paul’s pneumatic community, and John’s fellowship, etc..