The Bhakti traditions don't have these problems too much. If you have a deep love for something, see emotions are usually much more powerful and they catch attention much more easily. So back to the witness consciousness. There are other ways also. The Advaitic method is to recognize whatever thought, whatever distraction is entirely enabled, illumined and revealed in you the awareness. Then, Atman Nava, Vashram Naid, bring the mind under control or we can say, again, establish the mind in the witness Consciousness.
Swami Sarvapriyananda teaches Chapter 6 (Verses 26-27) of the Bhagavad Gita. In this series of talks, Swami Sarvapriyananda unfolds the highest truths of Vedanta through the study of the Bhagavad Gita (The Song of God).