Cacher is the code snippet organizer for pro developers

in local.xml:

<reference name="head">
<!-- Share this -->
            <block type="core/text" name="share_this">
            <action method="setText">
                <text>
                	<![CDATA[
                		<script type="text/javascript" src="http://w.sharethis.com/button/buttons.js"></script>
                		<script type="text/javascript">stLight.options({publisher: "pub_number_here", doNotHash: false, doNotCopy: false, hashAddressBar: false});</script>
					]]>
                </text>
            </action>
	    </block> 
</reference>


in page/html/head.phtml:

<?php /* Open Graph Protocol for Facebook and SEO */ ?>
<?php if(Mage::registry('current_product')): ?>
	<?php $product = Mage::registry('current_product'); ?>
	<meta property="og:title" content="<?php echo ($product->getName()); ?>" />
	<meta property="og:type" content="article" />
	<meta property="og:url" content="<?php echo Mage::registry('product')->getProductUrl(); ?>" />
	<meta property="og:image" content="<?php echo $this->helper('catalog/image')->init($product, 'small_image')->resize(200,200);?>" />
	<meta property="og:image:type" content="image/png" />
	<meta property="og:image:width" content="200" />
	<meta property="og:image:height" content="200" />	
	<meta property="og:description" content="<?php echo strip_tags(($product->getShortDescription())); ?>" />
	<meta property="og:site_name" content="<?php echo Mage::app()->getStore()->getName(); ?>" />
<?php elseif(Mage::registry('current_category')): ?>
	<meta property="og:title" content="<?php echo $this->getTitle() ?>" />
	<meta property="og:type" content="website" />
	<meta property="og:url" content="<?php echo $this->helper('core/url')->getCurrentUrl();?>" />
	<meta property="og:description" content="<?php echo strip_tags($this->getDescription()) ?>" />
	<meta property="og:site_name" content="<?php echo Mage::app()->getStore()->getName(); ?>" />
<?php else: ?>
	<meta property="og:title" content="<?php echo $this->getTitle() ?>" />
	<meta property="og:type" content="website" />
	<meta property="og:url" content="<?php echo $this->helper('core/url')->getCurrentUrl();?>" />
	<meta property="og:description" content="<?php echo strip_tags($this->getDescription()) ?>" />
	<meta property="og:site_name" content="<?php echo Mage::app()->getStore()->getName(); ?>" />
<?php endif; ?>


in catalog/product/view.phtml:

<div class="social">
	<ul>
		<li><span class='st_facebook'></span></li>
		<li><span class='st_twitter'></span></li>
		<li><span class='st_pinterest'></span></li>
		<li><span class='st_googleplus'></span></li>      	
	</ul>               	
</div>


css:

.social {
	line-height: 30px;
	
	ul li {
		float: left;
		padding-right: 6px;
	}
	
	ul li .stButton {
		background-image: url(../images/social-all@2x.png);
		background-size: 180px 60px;
		background-position-y: 0;
		text-indent: -9999px;
		width: 30px !important;
		height: 30px;
		display: block;					
	}
	
	.st_facebook .stButton {
		background-position-x: 0;
	}
	
	.st_twitter .stButton {
		background-position-x: -30px;
	}
	
	.st_pinterest .stButton {
		background-position-x: -60px;
	}
	
	.st_googleplus .stButton {
		background-position-x: -120px;
	}
	
	ul li .stButton:hover {
		background-position-y: 30px;
	}
}