How to get products available stock quantity in magento?

Here is the code to get produts stock quantity. Place this code in your view.phtml file.

echo $qtyStock = (int) Mage::getModel('cataloginventory/stock_item')->loadByProduct($_product)->getQty();

How to get configurable products attributes / super attributes details in magento?

   $productId = $_product->getId();
   $product=Mage::getModel("catalog/product")->load($prodcutId);
 
    /**
     * Get Configurable Type Product Instace and get Configurable attributes collection
     */
    $configurableAttributeCollection=$product->getTypeInstance()->getConfigurableAttributes();
 
    /**
     * Use the collection to get the desired values of attribute
     */
    foreach($configurableAttributeCollection as $attribute){
        echo "Attr-Code:".$attribute->getProductAttribute()->getAttributeCode()."
";
        echo "Attr-Label:".$attribute->getProductAttribute()->getFrontend()->getLabel()."
";
        echo "Attr-Id:".$attribute->getProductAttribute()->getId()."
";
    }

How to get Most Viewed products in Magento?

Here is the code to get most viewed Products in Magento

    /**
     * Number of products to display
     * You may change it to your desired value
     */
    $productCount = 5;
  
    /**
     * Get Store ID
     */
    $storeId    = Mage::app()->getStore()->getId();     
  
    /**
     * Get most viewed product collection
     */
    $products = Mage::getResourceModel('reports/product_collection')
        ->addAttributeToSelect('*')
        ->setStoreId($storeId)
        ->addStoreFilter($storeId)
        ->addViewsCount()
        ->setPageSize($productCount);
  
    Mage::getSingleton('catalog/product_status')
            ->addVisibleFilterToCollection($products);
    Mage::getSingleton('catalog/product_visibility')
            ->addVisibleInCatalogFilterToCollection($products);
  
    print_r($products);

Configurable products options are empty after moving my cart side bar to header?

I have explained Moving Cart from Right Sidebar to Header in this tutorial. After moving my cart to header I have noticed configurable options are not shown up in header. To display configurable product options do the following.

Edit your "template/checkout/cart/sidebar/default.phtml" file.
Find the line if ($_options = $this->getOptionList()):

Replace with the following

$_product = Mage::getModel('catalog/product')->load($this->getProduct()->getId());
$config = new Mage_Catalog_Helper_Product_Configuration();  
if ($_options = $config->getConfigurableOptions($_item)): 

Thats it. You are done.