Readability is amazing, I've been using it for few weeks now. Allow me to offer other "readability" tips (that pertains to LCD monitors, especially concerning eye strains)as well:
-Readability alternative -
Readable-app - I prefer Readability because of its text flow formatting (i.e. when you resize your browser horizontally, the text doesn't overflow and you don't get a horizontal scroll bar... btw in general, when it comes to this issue, I find Chrome to be superior than other browsers including Firefox). Guess I like small-columned paragraphs with wide, wide margins. However, Readable-app offers more styling options that may suit your liking.
-Fonts - A general rule is Sans-serif fonts such as Verdana for electronic displays
-Colours - Personally, I find light-coloured text on dark background easier to read (esp. in a low-light setting). You may relate if you find terminal screens with black background with green/white texts easier on your eyes. For my browser, I use the same teal-like colour used in sites such as
Ask MetaFilter for background and a very light-green hue for texts (the key is to get a nice contrast). Inverting colours on your OS is another solution
- Windows - "Alt" + "Shift" + "PrtScn" (although some people might not like this very much b/c it changes GUI/theme for your Windows)
- OS X - "Ctrl" + "Option" + "Apple" + 8
-Larger-sized fonts for your browser... obviously
While I assume many people here already know all these given the nature of this forum, I certainly hope the info. comes across as new for others. Cheers.