Premanand Maharaj Ji
How do I meditate when my mind is full of thoughts?
Meditate on the Name and bring the mind back
Meditate on the Name, because the Name is what introduces the form. As you write the Name, when the mind runs, bring it back to the Name each time.
When we start writing Radha Radha again and again, the mind will run. Wherever it runs, bring it back to Radha Radha.