Being a follower of Srila Prabhupada, I feel happy to discover this remarkable saying of the founder of ISKCON -
Think of Krishna always and try to work sincerely, everything will come automatically who said this in a letter to Aniruddha, July 7, 1968.
The devotee must carry on thinking of Sri Krishna. He must follow all the principles mentioned by his/her guru. His respect to Sri Krishna and the incessant chanting of the Hare Krishna Maha Mantra will work like miracles in his life helping him to deal with the stressful life. The concentration power increases and the academic grades improve in school and college.
There is lack of sincerity in the work and academics and this causes poor performance on both. By following the path shown by Srila Prabhupada, we can get the ultimate peace and happiness. It is good to keep our mind free from all kinds of impurities of materialistic desires. Those desires lead us to the wrong path. We must always think of Sri Krishna and work sincerely. Everything will definitely come with the blessing of Sri Krishna. We will get the divine peace with the blessing of the supreme lord of the universe whose power has been mentioned in the holy book - Bhagavad Gita again and again and they have been discussed in the literatures of Srila Prabhupada.