Most people worship God as their order supplier. But Vrindavan consciousness is simply to give pleasure to Krishna and to not expect anything in return except the opportunity to serve. And when we chant the holy names with this spirit, Krishna reveals himself in full.
Simply we have to desire to please Him (Krishna) and not desire anything for ourselves. Then we become simply instrument for his will. This is the important essence of Krishna consciousness. — In his Letter to Atreya Rishi, 20th Oct, 1973.
For the pleasure of the Lord, His devotees call Him by His Holy Name to render service unto Him, not to fulfill their own desires.
Krishna tells in Bhagavad Gita, "Ananyas Cintayanto Mam Ye Janah Paryupasate" that if we just approach him with sincerity, then He will carry what we lack and preserve what we have". Just put your sincere and honest efforts to please Krishna then all your hearts, desires for the welfare of others can be fulfilled.
We have to be very enthusiastic and eager to accomplish wonderful things for God, but it must always be with a focus on the higher principle. It must always be harmonized with the higher principle of pleasing Him.
By chanting of Hare Krishna, you have the Lord with you and He satisfies you. He pleases you. You are pleased with your Lord. He is also the Lord of your heart.