Fix header

I am trying to figure out how to stretch the header on my site to fit the entire width of the screen. Also, I am looking for a way to add buttons (such as facebook, twitter, email, etc.) to the header so people can see them easier.

My site:
http://www.crazyforsavings.com

Example sites of how I want it to be:
http://dealiciousfinds.com
http://wildforwags.com
http://www.totallytarget.com/