How to stay awake during lectures?

Ok so I'll be a freshman at ucsb this fall. And during highschool I had trouble staying awake in classes like calculus and history both if which I have again in college (but nit because I failed the class in highschool) any way it's not as if I intend to sleep it just happens and I'm continually in a struggle to stay awake. For some reason coffee doesn't help and even if get a goid night sleep beforehand I still have trouble sometimes. So my question is how can I stay awake through each of my lecture classes (3) I really want to be successful in college.