Singing in Kirtana
Singing in kirtana means opening your heart, not just your mouth.
Uttama Bhakti
One may require 8 hours of sleep but he/ she is still doing uttama bhakti if the remaining 16 hours are spent serving Lord Krishna favorably.
Asking Questions
Unless one surrenders, asking a question to guru means only mental titillation.
Truth
Deeply search what you know is true. Serve it & love it, the Truth is blue.