It is somewhere in the middle of the night, only the lonely traveller is rushing to the safety of the old travel-lodge that sleepily blinks into the night. There is only a medical student sitting at the table, leant over the thick books revising for exams. Or something like that.
How do you stay awake during the nth hour of revision in that long long night? A search engine presents the standard selection of articles with advice to 'get plenty of sleep', 'exercise' and 'eat a healthy diet'. That is all great, however if I had time to get plenty of sleep as they advise, I wouldn't bring up the question in the first place.
If to steer clear of prescription medication, here are few techniques to support some sort of brain activity during long revision hours that work for me.
Coffee: a staple drink and it does work. A good bold roast of freshly ground coffee is not only a much needed crutch but also a legitimate 15 minutes break in the long stretch of reading, writing and memorizing.
Caffeine tablets: if a standard mug of dark roast no longer works, one can try caffeine tablets. However it is rather easy to take a bigger than optimal dose, and instead of enthusiastic revision to spend the night in cold sweat on the bed feeling queasy. Not exactly the result one aims for.
Water: drinking as much of cold water as possible. It actually works, one feels more awake, either because the well hydrated brain thinks better or the frequent bathroom trips make it impossible to sleep.
Breaks: taking a 15 minute break every 1.5 hours improves the concentration. If to believe memory curves, we memorize material better at the start and at the end of the study session, which is not the case for the material covered in the mid-session. Hence it follows if we minimize the 'middle' bit of the revision at any one time we will retain more material. I want to think this is true.