Eckhart Tolle
Eckhart Tolle wrote the books - "The Power of Now" and "A New Earth". I attended his Talks and Retreats in San Refael 2008, Australia 2009, London 2010, California 2013. 

In the teachings by Eckhart there are tools of awareness, helpful and good perception of thoughts and emotions, sensing the body and reaching internal peace, working correctly with negative emotions, staying in the present moment versus attachment to future or past, a connection to your being, and practical application of all this in all fields of life.

Here are pictures from the meeting with Eckhart Tolle and Kim Eng After the Retreat in Australia. It was lovely!