For WordPress.org and Blogger!
For self-hosted WordPress blogs I use the Pinterest Pin It Button for Images. And, for Blogger I insert some code into the template.
For WordPress you just need to Install, Activate and customize the plugin… it couldn’t be easier. I have found one conflict with Networked Blogs, so if you’re having problems with this plugin consider removing NB from your blog.
For Blogger I use code I found over at bloggersentral.com. You are going to be adding two bits of code to your template:
2. Then add this code above </body>
var bs_pinButtonURL = "http://i743.photobucket.com/albums/xx78/sweetfaerie/pin-it-button.png";
var bs_pinButtonPos = "topright";
var bs_pinPrefix = "";
var bs_pinSuffix = "";
// This Pinterest Hover Button is brought to you by bloggersentral.com.
// Visit http://www.bloggersentral.com/2012/11/pinterest-pin-it-button-on-image-hover.html for details.
// Feel free to use and share, but please keep this notice intact.
You may replace the bs_pinButtonURL with your own pin it button image.