An effective way to meet great people is to determine who was originally responsible for introducing you to the great people you already know. Come up with the names of 20 great contacts you have (exclude close relatives), and then work backwards to find the original facilitator of the connection.
For example, “I met Jim from Mary … and I met Mary through Greg … Greg was introduced to me by Al, whom I met at my first job.”
In this example, Al is the facilitator of your connection to Jim through a series of intermediate steps. Run through this exercise for several people and a pattern will emerge … a handful of productive facilitators. Reconnect with these productive facilitators and meeting more great people is sure to follow.