Readability is a free browser add-on that strips out distractions and only leaves your article behind. Websites are cluttered and have lots of advertising that can distract you from your article. Readability takes out the advertisements and distractions and only leaves the text of the article behind. In addition, Readability has options to increase text size and color for easier reading. Click here to download the extension which works with most browsers.
In iOS 5 there is a similar feature called Reader. Reader also takes out the advertising and clutter out of articles on the web. Unlike Readability, Reader only works with Safari for iOS devices. With these tools you will never have to be distracted by an advertisement again.