Today's success prescription: Check your energy level. Energy is key to effective studying. Some causes of tiredness may be inadequate sleep, hunger, poor diet, thirst, or overwork. Other health problems may also be the cause; if fatigue is a chronic condition not solved by taking care of the factors mentioned above, you should consult your physician. This will be a short post, but it's just a reminder that you don't always have to blame yourself if studying is going by slowly. Often a health factor is the cause.