<!-- Change page template -->
<reference name="root">
  <action method="setTemplate">
    <template>page/template_file.phtml</template>
  </action>
</reference>

<!-- Add/remove CSS/JS -->
<reference name="head">
  <action method="addItem">
  <type>skin_css</type>
    <name>css/file.css</name>
    <params/>
  </action>
  <action method="addItem">
  <type>skin_js</type>
    <name>js/file.js</name>
    <params/>
  </action>
</reference>

<!-- Add/remove CSS/JS -->
<reference name="old_parent">
  <action method="unsetChild">
    <name>block_name</name>
  </action>
</reference>
<reference name="new_parent">
  <action method="insert">
    <name>block_name</name>
  </action>
</reference>

<!-- Add/remove CSS/JS -->
<remove name="block_name">

<!-- Add/remove CSS/JS -->
<reference name="breadcrumbs">
  <action method="addCrumb">
    <crumbName>Link Text</crumbName>
    <crumbInfo>
      <label>Link Text</label>
      <title>Link Text</title>
      <link>Link-url</link>
    </crumbName>
  </action>
</reference>

<!-- Insert CMS block -->
<block type="cms/block" name="relevant_name">
  <action method="setBlockId">
    <block_id>static_block_identifier</block_id>
  </action>
</block>

<!-- Insert template file -->
<block type="cms/template" name="relevant_name" template="page/html/template_file.phtml"/>

<!-- Add address fields to customer signup form -->
<customer_account_create>
  <reference name="customer_form_register">
    <action method="setShowAddressFields">
      <param>true</param>
    </action>
  </reference>
</customer_account_create>