A dynamic theme in WordPress is key if you want to have a clean and organize site. WordPress offers ways to completely change a theme based on whatever the current page is.
One of the first sites I made in WordPress consisted of a bunch of different pages within my theme. Later on I found out that all my pages could be compiled into one, using the tricks below.
The Problem: You want to display the subpages of the current page
The Solution:
wp_list_pages("child_of=".$post->ID."&title_li=");
The Problem: You want to display the subpages of a different page other than the current one
The Solution:
$page = get_page_by_title('Residences');
wp_list_pages("child_of=".$page->ID."&title_li=");
The Problem: You want to test to see if the current post is in a curtain category
The Solution:
if (in_category('home')) {//is category}