If you have a website or a blog, chances are you want to increase the traffic to your site.
I just tried the free service, Website Grader, offered by HubSpot. In less than a minute I received a graded and detailed report on each of my various blogs (both as a link in an email as well as the actual web page for the report). After a quick look at the reports, I immediately made some changes to help Google and other search engines find my blogs more easily.
HubSpot even saved the links to my reports so I can go back and make additional changes when I have time later on for making more improvements to my sites.