A word of caution with cod liver oil: it is high in Vitamin A (and not the beta-carotene form), which in high doses can cause liver failure. A better option for Omega-3s would be flaxseed oil. You can also find Omega-3s in many food items like olive oil and walnuts. Just an inside note though, the initial research on Omega-3s was conducted by a pdoc whose wife owned a company who produced Omega-3 supplements. Was the data skewed? My pdoc (a colleague of his) seemed to think so, but this was about 10 years ago, and further studies may have been done since then.
As for light therapy, I use a box that uses blue light technology. It mimics the wavelengths one would get from a clear day with a blue sky. I've had it for six years now, I think, and I like it. It's small and portable and has both a timer and an alarm clock on it. The clock can wake you up with a chime and gradually increasing light, like a sunrise would. I was able to get reimbursement for it through my company's medical flexible spending account. With all the studies done on light therapy now, it may be covered by insurance. Here's a link:
http://www.usa.philips.com/c/light-t...289698/cat/en/
I've also heard of people who have used Sam-e and St. John's Wort for depression. Be careful with St. John's Wort though - it acts like a combination of an SSRI and an MAOI, and the MAOI dietary restrictions apply. I actually tried the SJW many years ago and it raised my blood pressure (what can I say, I love cheese...)
As always, check with your pdoc before trying any natural remedy.