Attempts to distil in a few pages the ideas contained in the pioneering work "Friends of Friends" by Jeremy Boissevain as might be relevant to a change agent. It argues that social systems are networks of choice?making people competing for scarce and valued resources. In order to change social systems, a change agent has to intervene in various networks, create some new networks and alter existing ones. It is argued that networking is central to changing. The note identifies key aspects of networks and identifies possible ways a change agent can use them.