Blogs are a good way of getting some interesting insights into economics. Below are some of the best economics blogs on the web. Economics is a big part of political theory, so, where I could, I posted the bias of the blog.
The Conscience of a Liberal, Paul Krugman: Mainstream Liberal (Keynesian)
Beat the Press, Dean Baker: Mainstream Liberal (Keynesian)
Brad DeLong: Mainstream Liberal (Keynesian)
Angry Bear: Multiple authors mostly left-leaning
Cafe Hayak: Conservative (Austrian School)
The Undercover Economist, Tim Harford: Mainstream
Marginal Revolution: Conservative
Robert Reich: Mainstream Liberal (Keynsian)
EconLog: Multiple Authors. Conservative (Friedmanite)
The Everyday Economist, Josh Hendrickson: Mainstream
Greg Mankiw: Mainstream, Great for Beginners!
Michael Roberts Blog: Left Wing (Marxist)
FRED: I like to use the Federal Reserve Economic Data when I write about economics. This is one of the best resources you can have at your disposal.
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