Can you cut back on anything? I'm not sure how much longer you have in school (or what level you are in). I know when I was in school, changing my job helped so much. I got burnt out on my midnight shift aide job and was able to find a day job in an office with fewer hours. I had to cut back money wise but it helped keep my sanity my last year in grad school.
Now, to fight burnout, I talk to people about what is frustrating me....at times it helps to talk to people in the same boat, at other times it helps to get a totally different point of view. Plus, I have to look at what is really bothering me....most of the time, it's my lack of real power so I have to do what I can do and hope for the best.
A big help for me is to also exercise. Get moving during the day. Make sure you sleep. Eat the right food regularly.