Add Custom Widget Areas in Genesis with Examples http://oncecoupled.com/2014/01/24/adding-custom-widget-areas/

functions-1.php

<?php # EXAMPLE TO REGISTER AND POSITION ANY NEW WIDGET AREAS

/**
 * Created By: Lauren Gray Designs
 * URL: http://oncecoupled.com
 */

//* POSTS Register new widget area

lgd_register_sidebars();
function lgd_register_sidebars() {
	genesis_register_sidebar( array(
		'id'		=> '[WIDGET_ID]',
		'name'		=> __( '[WIDGET_NAME]', 'CHILD_THEME_NAME' ),
		'description'	=> __( '[WIDGET_DESCRIPTION]', 'CHILD_THEME_NAME' ),
	) );
}


//* POSTS Postition new widget after posts

add_action( '[GENESIS_HOOK]', 'lgd_widget_after_post' );
function lgd_widget_after_post() {
	genesis_widget_area( '[WIDGET_ID]', array(
		'before'	=> '<div class="widget-area">',
        	'after'		=> '</div>',
	) );
}

?>

functions-2.php

<?php  # EXAMPLE TO REGISTER NEW WIDGET AREA AND PLACE BELOW PRIMARY SIDEBAR

/**
 * Created By: Lauren Gray Designs
 * URL: http://oncecoupled.com
 */

//* POSTS Register new widget area

lgd_register_sidebars();
function lgd_register_sidebars() {
	genesis_register_sidebar( array(
		'id'		=> 'lgd-psb-widget',
		'name'		=> __( 'Primary Sidebar - Bottom', 'CHILD_THEME_NAME' ),
		'description'	=> __( 'This widget area appears under your main sidebar.', 'CHILD_THEME_NAME' ),
	) );
}


//* POSTS Postition new widget after primary sidebar

add_action( 'genesis_after_sidebar_widget_area', 'lgd_sidebar_bottom', 9 );
function lgd_sidebar_bottom() {
	genesis_widget_area( 'lgd-psb-widget', array(
		'before'	=> '<div class="lgd-psb-widget primary-sidebar-bottom widget-area">',
        	'after'		=> '</div>',
	) );
}

?>

functions-3.php

<?php  # EXAMPLE TO REGISTER NEW WIDGET AREA AND PLACE BELOW EVERY POST

/**
 * Created By: Lauren Gray Designs
 * URL: http://oncecoupled.com
 */

//* POSTS Register new widget area

lgd_register_sidebars();
function lgd_register_sidebars() {
	genesis_register_sidebar( array(
		'id'		=> 'lgd-apc-widget',
		'name'		=> __( 'After Post Content', 'CHILD_THEME_NAME' ),
		'description'	=> __( 'This widget area appears after post content, to promote newsletter subscriptions.', 'CHILD_THEME_NAME' ),
	) );
}


//* POSTS Postition new widget after posts

add_action( 'genesis_entry_footer', 'lgd_widget_after_post' );
function lgd_widget_after_post() {
	if ( ! is_singular( 'post' ) )
		return;
	genesis_widget_area( 'lgd-apc-widget', array(
		'before'	=> '<div class="lgd-apc-widget after-post-content widget-area">',
        	'after'		=> '</div><div class="clear"></div>',
	) );
}

?>