SEO help!

Hi,
I’ve been asked to do some work on a site to help boost it’s SEO performance although am slightly stuck on a few issues. I didn’t build the site originally but is basically using wordpress as a CMS and is built around wordpress pages as opposed to posts. The problem I have is that currently the ‘Title’ of each page is used to populate the page’s title, H1 tag and also the page’s link in the navigation, however I need all three of these to be separate so they can be replaced individually for the SEO.

If someone could advise the best way to accomplish this or at least point me in the right direction, that would be much appreciated.

Thanks!