Is your prose easy to read? Go to this site, enter the URL of your website or blog, and find out how readable you are, as measured by the standard Gunning Fog, Flesch Reading Ease, and Flesch-Kincaid reading level algorithms. Here's how EducationPR scored. . .
Yes, this is fun. But it's also important. Readers should not have to fight to understand what you're trying to communicate.
I have to continually resist being sucked in to the academic jargon that's used in my work place.

The Gunning-Fog index measures roughly how many years of schooling it would take someone to understand the content. The lower the number, the more understandable the content will be to your visitors.
The Flesch Reading Ease scale rates text on a 100-point scale. The higher the score, the easier it is to understand the document. Authors are encouraged to aim for a score of approximately 60 to 70.
Flesch-Kincaid grade level measures how many years of schooling it would take someone to understand the content.
Thanks to Stuart Bruce for the pointer.