Can we use more than one H1 on a single webpage?
 

– Of course, if there is a need of describing two related topics on the same page then we can use, but using more than 2 or 3 will not provide any credit to the search engines. Matt Cutts advise on using more than one H1 tag

Using The <H1> Tag For Search Engine Optimisation
 

Using the tag obviously helps, using it in conjuction with a relevant page description and separating the topic by keeping your page layout in 'sections' can help not only the designer to emphasise the topic but makes it easier for the search engine to create the most relevant index.
The more variety you have on one page, the harder it is to concentrate on generating traffic to that particular page.
Having a heading that relates to the page content, and a page description with keywords to match should make things simple and obvious for everyone.