Here's one solution - one I tend to use (I spend a lot of time juggling roles and commitments!)
- Write a list of all the things you have to do and their deadline dates.
- Make a realistic estimate of the amount of time needed to complete the individual tasks. Its really important to be realistic and not optimistic!
- Draw up a weekly schedule and fill in all the things you have to do this week, next week etc(eg classes you need to be at).
- Then fill in all the things you need to get done aiming to complete them a few days before their deadline to allow for unforeseen delays.
- Then you can add in all the 'extra' things like gym, ceroc, seeing friends etc.*
- The key thing is to priortise and allow yourself enough time to get everything done without putting yourself under too much stress - though a little stress is usually a good thing.
I tend to be even more detailed and have things that are urgent or that can be done this week or next week, and preferred times to complete things and absolute deadlines...sort of a multi level list which I find allows me to be more flexible and adapt to changing circumstances more easily.
Hope this helps.
*Of course socialising is a vital part of student life so needs to be included!