Yes, there are lots of things you can do to improve your Google Page Rank. The two most important factors are Content and Links.
In business, the key to success is Location, Location, Location. But on the web, it's all about Content, Content, Content! The importance of your website is evaluated by the amount and quality of relevant content. This is by far the most important factor in Page Rank.
Adding a Blog or News module to your site is an easy way to include good content. You can update it regularly with interesting information about your business.
Another important factor in your site rank is the number and quality of links to your website. The two main categories of links are back links and cross links. Back links (or external links) come from outside websites. Cross links (or internal links) come from another page on your own site.
For more information, see our article on Improving Google Page Rank.