Premanand Maharaj Ji
जब बहुत नींद और सुस्ती हो तो नाम जप कैसे करें?
तमोगुण में बोलकर जप करें
Naam jap has three kinds: spoken, whispered and mental. When tamas (sleep, laziness) comes, only spoken jap will work.
When tamas comes, only spoken chanting will work: Radha Radha, or some chaupai or verse of Bhagwan that you have memorised.