title: Magento get list of item SKUs from orders
body: <p>I know Magento orders can be attained with 
      <code>$orders = Mage::getResourceModel('sales/order_collection');</code>
  but then how can I get the information for each order? The information I need most per order is: SKUs purchased, date purchased, money spent on each item, and discounts, if any.</p>
  
  <p>All help is greatly appreciated and I always accept an answer!</p>