Optimize Each Page
One of the most important things to understand is that each page is its own unit and has its own ranking potential and its own relevant keywords. Usually a home page has more value than the other pages since it is typically the easiest place to build links to. Home pages should generally be optimized for the most relevant competitive keyword phrases in your market that you feel you would be able to rank for. Interior pages should be optimized for other relevant phrases that relate to the content of each page.