1) First of all, before you’re going to start anything, download and read the security and anonymity Handbook of Anonymous:
Anonymous Security Handbook
2) After that you can install i2p. i2p is a secure and anonymous network of Anonymous where you can join safe and securely our IRC Channel, sent eMails, peer to peer and much more.
“I2P is an anonymizing network, offering a simple layer that identity-sensitive applications can use to securely communicate. All data is wrapped with several layers of encryption, and the network is both distributed and dynamic, with no trusted parties.”
More Information and Download here http://www.i2p2.de/