Sometimes in magento we are required to get list of orders of the current logged users. 

To do so lets see how we can do it:

first of all we need to get the logged in user id from the session for the same write the below code to fetch id of the user.

$user_id = Mage::getSingleton('customer/session')->getCustomer()->getId();

Afterwards we will write a query to load list of the orders of the user with this id. 

Lets write the query and pass the user id to it :

$orders = Mage::getResourceModel('sales/order_collection')

          ->addFieldToSelect('*')

          ->addFieldToFilter('customer_id', $user_id)

          ->addFieldToFilter('state', array('in' => Mage::getSingleton('sales/order_config')->getVisibleOnFrontStates()))

          ->setOrder('created_at', 'desc');

  $this->setOrders($orders);

In the above code we are passing the user id and from the resource model 'sales/order_collection' we are loading the the order with the customer id as 

$user_id in descending or to get the latest order on the top.

Now lets print the order id in foreach loop:

$i=0

foreach ($orders as $_order){

echo $i.'Order Id: '.$_order->getRealOrderId();

$i++;

}

In this way we can load list of orders of the current logged in user.