It sounds like you have a solid understanding of the listening process and how you relate to it! Your analysis of the similarities between the textbook's description and Julian Treasure's R.A.S.A. model is insightful, highlighting how listening can be both an informational and relational process.
As for your challenge with paying attention, it’s great that you're aware of it and are looking for ways to improve. Mindfulness is indeed a powerful technique for enhancing focus and presence during conversations.
Finding someone who shares a similar challenge in paying attention could be beneficial. For instance, if you connect with someone who practices techniques like deep breathing or visualization to ground themselves in the moment before engaging in conversation, you might find those strategies helpful as well. They may suggest setting intentions before a discussion, such as zoning in on one key point they want to remember or practicing active listening techniques like nodding and making eye contact, which can help keep your thoughts anchored.
Alternatively, if their approach involves taking brief notes during conversations to recapture their attention and maintain focus, that could resonate with you too. Trying out different methods could provide you with more tools to see what best suits your personal style of listening and how to build on your strengths in understanding and empathy.
Ultimately, I've found that combining different approaches can often yield the best results. Experimenting with various strategies, like mindfulness and active involvement, might help you cultivate a more attentive listening practice.