I would agree with everything that danatanseo stated regarding H2 and H3 tags. However, I would never use multiple H1 tags.
As stated in SEOmoz's own on page optimisation reports:
"Best practices for both SEO and accessibility require only a single H1 tag. The H1 is meant to be the page's headline, and thus, multiple H1s are confusing. Consider employing H2, H3 or CSS styles to achieve the same results with text visualization."
Hope this helps!