http://www.google.com
Perhaps, the best all purpose way to search the web. However, sometimes not the best way to access scholarly resources on the web. You may want to explore one of the resources listed below for alternatives.

http://www.rdn.ac.uk/
The Resource Discovery Network is a web directory that currently links to over 35,000 Invisible Web sites and other excellent Internet resources that have not been indexed by conventional search engines (Google, Altavista, Exicte, etc.) The directory is a cooperative network which includes BIOME (health and life sciences), EEVL (Engineering, Mathematics, and Computing), Humbul (Humanities), PSIgate, (Physical Sciences) and SOSIB (Social Sciences, Business, and Law). Research and academic in its orientation. There is a virtual training suite.

http://scout.cs.wisc.edu/
" The Scout Report is one of the Internet's longest-running weekly publications, offering a selection of new and newly discovered online resources of interest to researchers, educators, and anyone else with an interest in high-quality online material." The archive of this report is searchable and you can subscribe to the report for free.

Hunter College Library and The New York Public Library provide links to internet sites by subject area:

Hunter College
http://library.hunter.cuny.edu/search_guides.htm

NYPL
http://www.nypl.org/research/electronic/subject.cfm