How can I motivate myself?

I know we all have days where we feel down or just out of it, but I've been feelin this way for a few weeks now. I'm working and makin an honest livin but this is not the job I went to school for and I'm starting to believe that I will not get that job I went to school for, well, at least not now. I know the job market is tight right now but something I feel like I have failed myself. How can I become moviated again? Thanks.