headings

Is there any WordPress plugin or method to detect all article pages that have headings without H tags?

When writing about a product or biography, what would the best heading. How old is xxxx and When was it created? Or xxxx age and date of creation Would it be better to be a question or an answer heading?.

I have been wondering if I'm doing things right on my site, so I decided to ask the SEO experts here. What do you guys think about having more than one H1 title tags in a post? Theme provides for a post title area (which I'm sure has an H1 tag), but I am also in the habit of beginning each...