Here are 3 different methods that you can use to implement social sharing buttons into your blog template.
Plugins/Widgets
Plugins are widgets are the most popular method of adding social sharing and bookmarking buttons to blogs. They’re easy to install and most of the time need very little setup (if any at all) to get started. The top two blogging platforms are WordPress and Blogger, so let’s take a look at a couple plugins and widgets for each.
Blogger
Bookmarking Buttons Widget – A stylish, customizable widget that adds medium sized sharing buttons to your content.
AddThis – You can create an AddThis widget in under a minute. Just pick your platform and style and you’re done; there are quite a few styles and platforms (other than Blogger) to choose from. You might also like ShareThis , which is very similar.
WordPress
SexyBookmarks – One of the most popular plugins for adding social sharing buttons above or below your content. You get to choose which services are shown on your blog and you can customize the background image.
Sociable – A useful plugin for adding small social sharing icons to the bottom of your content; there are 99 different sites to choose from. This plugin also happens to have a Blogger version.