Magento: Add block to content area of home page
Go over the main menu to CMS -> Pages and open the home page. Then go to the tab "Design" and edit the code. The following example adds a block at the end of the content area.
<reference name="content">
<block type="core/template" name="cms_name_of_the_block" template="page/widget/2columns.phtml">
</block>
</reference>