We also need a stable rhythuj of working and sleeping. FInd out what facilities and opportunities for exercise there are available on campus and in the community. Find one or two forms of exercise that you can enjoy and that you can fit into your schedule. Research indicates that health, endurance and general well-being are all dependent on circulation fitness. The only way to achieve this is through regular exercise.
Mental fatigue is most often simply boredom.
All of these suggestions are ways to reduce boredom.