There is no immediate solution for discouragement, other than faith in the process which Srila Prabhupada has given us for becoming Krishna concious. As we grow in Krishna conciousness, we realize just how much more the distance is which we have to go before we can transcend everything to do with this material world. But we should never lose hope. That you cannot give up your sadhana means that you have hope. Otherwise why would you continue to follow?
Collected Letters to Friends and disciples Vol 5, Pg 33, 2nd paragraph.