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.
Consumer Reports: Consumer Reports is a really good way to get actual useful information on the products that you may want to buy. Don't rely on the advertisements to help you make your decision. They are designed to deceive you.
On-Line Lecture Notes