What is the best way to stay alert at night to study without feeling sleepy?

Sleep. Staying awake at night to study usually occurs when a student "crams" the best way to deal with this is not have to cram. There are certainly wake me up drinks on the market, that have some effect and of course there are illicit drugs as well none of which i would ever recommend. I would suggest studying over the course of the course and not waiting until the last minute to cram.