- Always have a glass of water nearby and take a sip everytime you feel yourself drifting.
- Get up and stretch every 20 mins to get your blood pumping again. Don't try and cram for hours on end as you wont retain much.
- Recognise what you do know so you dont go over that again and again.
- Work out how you learn best and use it. Eg. If you are a visual person draw mindmaps to link things together. When I was doing anat and phys I had numbered lists and I knew how many items were in each list so it prompted them all. Find out what works for you.
- Eat well. It is easy to go to the junk food but it makes you sluggish. So if you have it (and dont we all when we are studying) make sure it doesnt replace nutrition. Light fresh foods like salads seem to be especially good.

I know how you feel but it is worth it in the end.