Graduate school in economics

Information from the American Economic Association on preparing for graduate school
This is a very helpful website with a lot of useful information on economics programs, math preparation for PhD programs, program rankings, careers in economics, etc. 

Williams College Economics advice on preparing for PhD program in economics
This page has a lot of good information, and a number of helpful links to other relevant sites. 

Advice from Susan Athey (Stanford) on graduate school in economics

Advice from UC Berkeley Economics on courses to take in preparation for an economics PhD

Extensive and detailed advice from Richard Startz, UC Santa Barbara

Other Links

Game Theory
Game theory books, lecture notes, game theory in the news and in movies, books and on TV.

YaleGlobal Online
Publication of the Yale Center for the Study of Globalization

The Library of Economics and Liberty
Many classic works online, from Adam Smith to Jeremy Bentham, John Stuart Mill, Alfred Marshall, Frank Knight, Eli Heckscher, and the list goes on...

McMaster Archive for the History of Economic Thought
Another very large collection of important books on Economics

Resources for Economists on the Internet
(A comprehensive catalog of economics web sites)

Social Science Research Network
(Access to a large collection of abstracts and often full articles of working papers)