From a procastinator who was regularly forced to work night shifts. Exercise while learning. You can also practice flashcards while walking. Instead of sleeping, take 3 power naps. I take a key in my hand so that it falls down and I get scared to know when I have slept enough. Don't forget to set a safty alarm clock. The last tip really works wonders for a short time. Put an ice cube between the 1 and 2 cubes you feel below the back of your skull and let it completely melt there. Many important nerve pathways converge here and with the cooling you reduce the membrane potential and can thus imitate the effect of several hours of sleep. Of course, in the end, nothing replaces deep sleep and you should be aware that the later the hour, the higher your error rate. so complicated things are better done early and formatting rather at the end.