Eckhart Tolle is amazing, he teaches about Presence and the pain body etc. He had a big awakening. His most well known book is 'The power of now'.
Eckhart Tolles work has certainly helped me remain present in many situations and much more besides.
I have a lot of his audios - highly recommended, especially the ones where he has an audience (you get so much more out of true communication as opposed to author just 'reading' book).
Quite simply, I love the fella! (including his bizarre snuffle of a laugh!)