To conquer desires and anger, one must control the mind; to Arjuna’s statement that it is very difficult to control the mind, Krishna agreed and said it can be achieved through practice and renunciation. Hence one must keep attempting to successfully conquer them.
We must increase our involvement with Perumal through Perumal kainkaryam, participating in kalakshepam, performing the daily spiritual and religious austerities, etc. As one involves more and more in these, the focus on material matters will decrease leading to a decrease in desires and anger. Kannan has mentioned this in Srimad Bhagavadgita.