Krishna wants only your love. He does not care about anything else. Just do something for Him. Chant for His pleasure. Pray for His pleasure. Hear His pastimes for His pleasure. Do not do these things because you "have" to do it. Each day, just dedicate some time to do something for Krishna's pleasure. A little leaf, flower, or water, if offered with love and devotion, will be accepted by Him.
Collected Letters to Friends and disciples Vol 3, Pg 198