Logical division of file structure

Hi,

I’m currently in the process of creating a WordPress theme. Chose to first make my PSD into HTML/CSS and then code that into a WordPress theme. Though, now I have to decide how I’m gonna make the structure.

The front-layout:
https://i53.tinypic.com/1zm1og4.jpg

The top part should display the 5 latest news articles (basically blog posts), so for example A Last-Minute offer for Christmas. Clicking it should take them to the link. Under this, there are the 5 sections of the site, a short intro to what it is and then the link to that specific page.

I believe I have three sections:
– Home page
– Blog posts
– Category Specific page

The last 2 make us of the same header and footer, but instead of the newsbanner + 5 columsn, it just have on the left a main content area and on the right a sidebar with for example if we’re talking about the ‘Vacation homes’ section th Latest Offer on the topic, latest references etc.

But for the category specific page I believe the ‘main’ part should be static ( a standard text that doesn’t change often) and the sidebar will change (for example the newest blog posts). For the blog posts page (which just features all blog posts/news) the main page should not be static. How do I go around and organize my site? What should I widgetize and what not?