Dashboard >>> Layout >>> Add a gadget
<div class="widget-content">
<center><a target="_blank" href="Your Google Plus ID" style=""><img style="width: 60px; height: 60px;" alt="ads" src="http://freeiconsweb.com/Icons-show/IS_google_plus_one/google1_6.png" border="0"></a>
<a target="_blank" href="Your Twitter ID"><img style="width: 70px; height: 70px;" alt="ads" src="http://t0.gstatic.com/images?q=tbn:ANd9GcScswFryEig8RJuGjszsFKxn_uWFw6PLjjjK223hnpSuhYAPjIr" border="0"></a>
<a target="_blank" href="Your Facebook ID"><img style="width: 70px; height: 70px;" alt="ads" src="http://cdn1.iconfinder.com/data/icons/socialize-icons-set/128/facebook.png" border="0"></a></center>
</div>