Readability

Do this.

Go to the one-page Readability site. Click three radio buttons. Drag an icon to your browser toolbar.

Now, next time you want to read an article buried among banners, sidebars, and headers... just click your Readability icon and the article ONLY will fill your screen in the width, font size, and format that you selected.

Neat, clean, easy.

(Thanks to David Pogue and Chuck O.)