One that you keep coming back to over and over again.
Who gave it, where was it given and when?
What inspires you about it?
Mine is a talk a by Srivati titled "Becoming a Citizen of the Present" given at a National Order Weekend in 2001. I love how she talks about Mindfulness in Track 7 using her own poetry to describe her own process and connect with others in our common aspirations to remain present in each moment.
Also, Track 3 is one of my favorite readings of a favorite story from the Pali Canon - Bahiya of the Bark Garment.
In the seen merely the seen, in the heard merely the heard, in the sensed merely the sensed, in the cognized merely the cognized...