With usability as the new SEO (and rightly so) its worth while knowing the different online tools to test your sites usability. These things can be the make-or-break factors between a user clicking on a link to find more information, or the back button to find it elsewhere. Some things to consider:
Are important information being seen by the user?
Are the navigation and action items intuitive?
Is the user being directed to sections in a logical manner?
Does the web page load quickly enough to not turn away the user?
If you’re interested in analyzing and optimizing your page layout - here’s some extremely useful tools that you can use to help
Click here to view them at Six Revisions