Help for the Moody Blues

Does anyone know what foods or supplements are helpful mood boosters. I have felt so lazy, unmotivated and just down right blah these past few weeks. I never have liked this time of year with the cold, gloomy weather that comes with it. I'm a beach girl and you can't get that here in Kentucky. Any suggestions? I've gained five pounds this past month and keep eating things that are crappy. I have good days and really bad days because some days food just doesn't satisfy me. Has anyone else experienced this?