When feeling rested, Carlos should study because if he does so when he is tired he runs the risk of burning out. He will feel tired and he will get even more tired while studying.
A way to strike a balance between studying time and leisure is to have breaks. These breaks will help Carlos relax and free his mind from the burden of studying so much.
If he asks help from a tutor, this will probably give Carlos some tips about the organisation of his studying time and the way to approach the material. These tips will help Carlos to avoid frustration.
