// normal text field attribute
<?php echo $_helper->productAttribute($_product, $_product->getCustomAttributeName(), 'custom_attribute_name') ?>
example: <?php echo $_helper->productAttribute($_product, $_product->getLearnMore(), 'learn_more') ?>
// drop down attribute
<?php $attribute = $_product->getResource()->getAttribute('product_size');
if ($attribute) {
echo $attribute->getFrontend()->getValue($_product);
} ?>