Short meditation establishing mindfulness of the body, then noticing the effect of getting caught in thinking and returning the awareness to relaxing physical tension
Below are the resources on renunciation Mark mentions in the opening of the talk:
https://docs.google.com/document/d/1JolUrzOX8ESARJcK1VpW9E70Ff0vZx9agawRowDtJnE/edit?usp=sharing
https://docs.google.com/document/d/1Ohn3k_urMZaVwDQtaQ4ZArWtn8scVk2ONpT-7lPpONM/edit?usp=sharing
https://docs.google.com/document/d/1JolUrzOX8ESARJcK1VpW9E70Ff0vZx9agawRowDtJnE/edit?usp=sharing