Send/receive e-mail: the main use of the Internet.
Send/receive Chat room and Instant Messages: same time message exchange.
Participate in Web Forums: discussions, help and information.
Participate in Online Communities: Facebook, MySpace, YouTube.
Participate in Audio and/or Video Conferencing: same time voice and/or video communications.
Participate in mailing and discussion lists and newsgroups: you can get help and receive news.