Thanks for the suggestions guys. I am upping my vitamin D3 supplementation to 10,000 IU from 5,000. I'm looking into a SAD light but I'm not sure when to use it. Trouble is I move around a lot. During some weekdays I stay at my parents, wake up at 7 am, go to university, sit in the library for a few hours, then go to lectures, then back to the library etc. Maybe I'll wake up an hour early and use the SAD light and read, not sure.
You just need to sit in front of it for 20-30 minutes first thing in the morning. I just read my paper and do computer stuff while I am doing it. You dont look directly at it but have it off to the side shining at your face. Mine is about 6X6X1 inches and about 1 pound. Could take it to the library with you. It will take a week or two for you to notice anything though just to warn you.