Ahhh, the good old uni days. There's nothing quite like cramming it all in at the last minute.
First you gotta figure out what you need to do for each subject, like what topic to study and what needs to be done to finish the assignments and so on.
If you're short on time, then once you've recognised all the things you need to do, I'd recommend Time-boxing so that you only spend a fixed amount of time for each item on your list of things to do. The idea being that you do the best you can do in the time you set aside for it and then move onto the next thing. That way, certain tasks are less likely to hold up other tasks.
Don't forget to include a good amount of rest and revision in your schedule.
Regards,
Yynatago