I work 3 12- night shifts (Friday, Saturday, Sunday) I have done it since the first day of nursing school. It's hard and I have days that I go on short 20 min. naps. I never work the night before a clinical day. I also make sure that I take off a day and half before an exam. Other than that I have been able to get through each semester. Flipping back and forth. I have motivation for personal reasons to do this.
You must eat well, take naps when you can. Know your personal limitations. Show a positive attitude and know that if your semester is 15 weeks...you remind yourself that it's only for 15 weeks. (15 Monday's or 15 Friday's...)