Which page should rank for which keyword? That is the question. It's your question, and it's Google's question. What you need to do is a) build a spreadsheet that matches ONE (and ONLY ONE) major landing page for a keyword phrase, and b) as you create content, use INTERNAL LINKS to link to that ONE and ONLY ONE page as you mention that keyword across blog content.
For extra credit, make sure your HOME PAGE and KEYWORD FOOTER also focus you "link juice" to those keyword-specific landing pages.
Read more, here.