This page contains some useful databases that try to encapsule thousands of years of human contemplation.  No daydreaming, please.

Philosophy 

http://plato.stanford.edu

This is Stanford University's on-line encyclopedia of Philosophy.

Bartleby 

http://www.bartleby.com

Bartleby's has the full texts of documents ranging from Bulfinch's Mythology to the King James Bible.

Mythology 

http://www.pantheon.org

The Encyclopedia Mythica has information on Greek, Roman, Norse and Celtic cultures among many others.