Here's an example of ordinary page with all most common elements: HTML header, page title, navigation menu, editable body elements and a footer.
<html>
<head>
<title>{{ page.site_header }} - {{ page.title }}</title>
<meta name="keywords" content="{{ page.keywords }}" />
<meta name="description" content="{{ page.description }}" />
{% stylesheet_link "style.css" %}
{% rss_link %}
</head>
<body>
<div id="header">
<h1>{{ page.title }}</h1>
<ul id="menu">
<li><a href="{{ site.root_item.url }}">{{ site.root_item.title }}</a></li>
{% for item in site.menuitems %}
<li><a href="{{ item.url }}">{{ item.title }}</li>
{% endfor %}
</ul>
</div>
<div id="content">
<div id="body">
{% content %}
</div>
<div id="sidebar">
{% content name="sidebar" %}
</div>
</div>
<div id="footer">
{% content name="footer" xpage="true" %}
</div>
</body>
</html>