The "persuasive" approach is reminiscent of the basic techique in Vipassana meditation: focus on a particular sensation (breath at the tip of the nose, tingling

The "persuasive" approach is reminiscent of the basic techique in Vipassana meditation: focus on a particular sensation (breath at the tip of the nose, tingling sensations in right toe, ...) and whenever that focus drifts off, just bring it back. Rinse, repeat.