They say that around the holidays there is more depression than any other time of year. I also think that there is a lot after the holidays. There is such a build up to each holiday that after the presents are open and the decorations are taken down, there is a lot of let down. I believe this is true even for people that got what they wanted.
I suggest that you start a hobby, or start the plans to change your house around. Maybe even volunteer. Volunteering during the holidays is a really great idea, but there are so many people that do it at that time that sometimes there's no more room. No one is out looking for volunteer opportunities after the holidays. A great website that will help you pick a place to volunteer is http://www.volunteermatch.org/.
The best way to get out of your own head and feel better about yourself is to help others with their problems.
I hope everyone had a happy holiday season and is looking forward to a wonderful 2013!