question: dear doctori want to say that my mind is not sharp. i am a good student at school and college. now i am studying and as well as doing job but my concentration power is low now. i am 23 years old. my job timing is 9 to 6. after that i take 2 hours rest and then study for 3 hours but my concentration is low.pls give me some tips to sharp my mind and suggest me something like some dose or any type of exercise to fresh my mind and concentrate on my studyRgdsArif Hussain