How to create a node programmatically

// Create the node.
$node = array(
   'title' => 'My Title',
   'type' => 'my_type',
   'body' => '',
   'status' => 1,
   'promote' => 0,
);
if ($node = node_submit($node)) {
   $node->uid = 1; // set the user since we are running under cron
   $node->newsletter_status = 'Preview Required';
   $node->scheduled_send_date = date('Y-m-d H:i:s',$next_scheduled_send_date);
   node_save($node);
   $nid = $node->nid;
   watchdog('An Identifier such as the module name', 'function_name: Created node'.$nid);
}else{
   watchdog('An Identifier such as the module name', 'function_name: Failed to create node_type node',null, WATCHDOG_CRITICAL);
}