Mostly I'd recommend just looking for information that interests you. Your time on the net is your own time, and is best spent doing things you like to do. If you want more structure than that, though, here are some additional sources, ranked by whim one morning.
1. Webnovice - This magazine-style site has the snappy feel of a good consumer product. http://www.webnovice.com/
2. Explore the Internet - The Library of Congress - This site's a winner - well-organized, attractive, and comprehensive. http://lcweb.loc.gov/global/explore.html
3. The Polaris Internet Guide is comprehensive and well-organized - http://users.southeast.net/~habedd/polaris/topnoframe/contents.htm
4. NetLearn from Robert Gordon University in Scotland is comprehensive and well-organized. http://www.rgu.ac.uk/schools/sim/research/netlearn/callist.htm
5. PBS' Understanding and Using the Internet is similar to the Polaris guide, but a little lighter on text and information - http://www.pbs.org/uti/
6. The Help Web - More brief, organized information. Similar to the PBS site. http://www.imagescape.com/helpweb/
And finally, if you'd like a book - Washington Post reviews for 6 printed Internet guides - http://www.washingtonpost.com/wp-srv/tech/daily/june/15/net.htm
Introduction
to the
Internet
Jeff Williamson
What can I do on the Internet?