Recently I worked on optimizing a clients website, which went pretty smoothly after 1 small change on every page. That change was simply removing "home page" from the title of every page and replacing it with a title that actually went along with what was on the page, including keywords.
The page title should be, well, the page title and seems self explanatory, but many sites that are done by a novice (I hate categorizing people like that) don't have page titles at all.
You might now be asking "Dan, what's a page title?". The page title is what you see in the tab at the top of your browser as well as in search results and if you bookmark pages. The page title is very important, not only for optimization but when people look through search results (which you won't be very high in if you use "home page") they read the page titles and if the title just says "General Industries" they aren't going to know if General Industries has what they are looking for.
In addition to the page title, using META descriptions is important, not really for SEO right now but it sometimes accompanies the page title in search results, giving searchers more information about your page.