If you do a lot of reading on a computer screen and find it difficult to focus because of small fonts and banner ads, there’s a great simple web app called Readability. You can choose the style and size of type as well as the margins and it gets rid of all the distracting stuff. Just go to the website and choose a couple settings and drag the app to your browsers bookmark bar (works with safari, firefox, or chrome). For IE just right click and add to favorites.
It’s pretty reliable in finding the main article (it doesn’t do so well on front pages of papers, but almost always on an article page). All you have to do is click on the button in your bookmark bar and the page automatically formats to something that is much cleaner and doesn’t tax your eyes. Try it!