If you aren't a fan of Google Reader's new interface, this add-on will take out all the clutter, giving you a pretty, readable version of the current article and nothing else.
This add-on overhaul's Google Reader's interface to look more like Instapaper or Readability -- it gives it a better looking font, strips out the buttons and other nonsense, and even hides the left sidebar until you mouse over it. It doesn't give you quite as many options as something like the famous Minimalist Everything extension, but it sure makes Google Reader a lot nicer for actually reading your articles.
To install it, you'll either need the Stylish extension for Firefox or Chrome, or you can choose to install it as a user script (for which Firefox users will need the Greasemonkey extension). Hit the link below to check it out.