I have found that lately, anything by Queen lifts me up. I really blast it when I am in the car alone and don't even think about much. I have had a rough last year and music was the only thing that helped me go to work.
Do you like latin music? I could recommend you some, like Sergio Mendez, Santana or Juan Luis Guerra, all available on I tunes. Donna Summers, Abba, and the sound track for Grease come to mind too.
Hope the music helps and you feel better soon.