By this time you must be convinced that the subject of fatigue is exceedingly complicated; that its effects are manifested differently in mind and body.  In relieving fatigue the first step to be taken is to rest properly.  Man cannot work incessantly; he must rest sometimes, and it is just as important to know how to rest efficiently as to know how to work efficiently.  By this is not meant that one should rest as soon as fatigue begins to be felt.  Quite the reverse.  Keep on working all the harder if you wish the second-wind to appear.  Perhaps two hours will exhaust your first supply of energy and will leave you greatly fatigued.  Do not give up at this time, however.  Push yourself farther in order to uncover the second layer of energy.  Before entering upon this, however, it will be possible to secure some advantage by resting for about fifteen minutes.  Do not rest longer than this, or you may lose the momentum already secured and your two hours will have gone for naught.  If one indulges in too long a rest, the energy seems to run down and more effort is required to work it up again than was originally expended.  It is also important to observe the proper mental conditions during rest.  Do not spend the fifteen minutes in getting interested in some other object; for that will leave distracting ideas in the mind which will persist when you resume work.  Make the rest a time of physical and mental relief.  Move cramped muscles, rest your eyes and let your thoughts idly wander; then come back to work in ten or fifteen minutes and you will be amazed at the refreshed feeling with which you do your work and at the accession of new energy that will come to you.  Keep on at this new plane and your work will take on all the attributes of the second-wind level of efficiency.

Besides planning intelligent rests, you may also adjust yourself to fatigue by arranging your daily program so as to do your hardest work when you are fresh, and your easiest when your efficiency is low.  In other words, you are a human dynamo, and should adjust yourself to the different loads you carry.  When carrying a heavy load, employ your best energies, but when carrying only a light load, exert a proportionate amount of energy.  Every student has tasks of a routine nature which do not require a high degree of energy, such as copying material.  Plan to perform such work when your stock of energy is lowest.

One of the best ways to insure the attainment of a higher plane of mental efficiency is to assume an attitude of interestedness.  This is an emotional state and we have seen that emotion calls forth great energy.