google webmaster internal links and seo and site architecture

According to webmaster tools, some of the most linked internal links on are
and /termsofservice.htm.

then my admin profile
then /forums/ and /threads

Google says the number of links pointing to a page represent its importance. "or if a less important page has a relatively large number of internal links, you should consider reviewing your internal link structure. "

How do I tell google to move forums/ and threads/ up in importance? robots.txt? The top internal links exceot for my domain name are not useful for SEO or telling google what my site architecture is like. I don't want google to think /online is the second most important link on my forum!