Integrate Open Graph with Tumblr

gistfile1.html

<!-- Open Graph tags for your home page (index). -->
<meta property="og:site_name" content="{Title}" />
<meta property="fb:app_id" content="FACEBOOK_APPID"/>
<meta property="fb:admins" content="FACEBOOK_USERID" />
<meta property="og:description" content="{MetaDescription}" />
<meta property="og:locale" content="en_US" />

{block:IndexPage}
	<meta property="og:image" content="{PortraitURL-128}" />
	<meta property="og:title" content="{Title}" />
	<meta property="og:type" content="blog" />
	<meta property="og:url" content="YOUR_SITE_URL" />
{/block:IndexPage}

{block:PostSummary}
	<meta property="og:title" content="{PlaintextPostSummary}" />
{/block:PostSummary}

<!-- Open Graph tags to customize your permalinks. -->
{block:Permalink}
	<meta property="og:type" content="article" />
	<meta property="og:url" content="{Permalink}" />
	{block:Posts}
		{block:Text}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/mmHla8c7g/text.png"/>
		{/block:Text}
		{block:Photo}
			<meta property="og:image" content="{PhotoURL-500}"/>
		{/block:Photo}
		{block:Photoset}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/ACBla8cb5/photo.png"/> 
		{/block:Photoset}
		{block:Quote}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/kahla8ccw/quote.png"/>
		{/block:Quote}
		{block:Link}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/K6Vla8cek/link.png"/>
		{/block:Link}
		{block:Chat}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/9Ysla8cgl/chat.png"/>
		{/block:Chat}
		{block:Video}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/KiUla8chx/video.png"/>
		{/block:Video}
		{block:Audio}
			<meta property="og:image" content="http://static.tumblr.com/vswwmyc/FyZla8c36/audio.png"/>
		{/block:Audio}
		{block:Answer}
			<meta property="og:image" content="{AskerPortraitURL-128}"/>
		{/block:Answer}
	{/block:Posts}
{/block:Permalink}

This was super helpful to me today. Thanks!