Use #randomtext# codes to attempt to build theme.
Forms using option lists like the one above helps.
Make sure you have a few #secondarykeyword# images on the page with your keywords and keyword synonyms in the alt text.
About the only thing you are penalized for on Google is having an unpopular site. Google places a lot of stock in link popularity. Your pages will do a lot better on Google if they have some incoming links.