We have to remember these things while continuing with all of our duties in this world. This "remembrance" is a duty which you also cannot neglect. Despite everything else which will be expected of you, Krishna wants you to remember Him through chanting and hearing. You must balance your life in such a way that you can optimize whatever time you have for your daily sadhana for increasing your remembrance of Krishna. If you make this duty a solid commitment in your life, then you will see that this life will go by very quickly, and, towards the end of this life, there will be nothing which will make you want to come back to this world again.
(Collected Letters to My Disciples, Pg 137, Last Paragraph)