Sometimes you can find really good articles in strange places, like this opinion piece here from USA Today on how the FBI abused its power under the USA Patriot Act. The article's central point is that the Patriot Act gives law enforcement agencies such great leeway that they are essentially encouraged to abuse it. The Patriot Act hasn't really been an issue for a good two years or so when it came up for reauthorization, and this article brings up some of its more egregious problems. Definitely check it out.
Also, Timothy Noah gives another excellent analysis of the healthcare problems we have in this country over at Slate magazine.