Personally I always write after I get home from school. If I did it in the morning, my brain wouldn't be up to it and I'd end up writing absolute rubbish.
I did, however, find a great way to get in the zone yesterday. I closed my blind so that only a bit of sunlight got through. I could still see the keyboard and it was still reasonably bright, but the darkness helped me to relax and I wrote what I thought was a good article