I love cool it when blogs have the cool social media buttons. There are hundreds to choose from...Here are a few of my favorite places to look for free buttons.
Many of these sites you will find links to cut in paste. The same method to add these buttons are the same way I told you how to HERE. It is also simple to create your own to match your blog. It is just like creating an avatar. You can make them any size you want, but you don't want to make them larger than the width of your column.