Content is almost everything. Keep it fresh, accurate and relevant to your target audience. Each page must be considered as to whether it truly provides needed content. Ask yourself this: If you printed a page from your computer and put it up on a bulletin board in a hallway, what is there about that page that would bring anyone to care about it? The same should be asked about any web page.
Strive for Ease of Use – have others test your site. 60% of e-Commerce sites have people not knowing how to finish the transaction (like how to check out their shopping cart).
Visit: http://www.psychologytoday.com (good articles on what helps visitors on the web)
Try using plug-ins and multimedia: start with a still image and ask them if they are interested. If so, give them a link to click on to let them choose. But avoid overkill on multimedia and remember flashing lights trigger migraines and seizures.
Check out a few good examples of web pages with multimedia: