I haven't read The Power of Now, but I love A New Earth. Tosh, I noticed immediately the overlapping of Buddhist principles with Tolle's work. Both have a heavy emphasis on ego/self not seen as a separate entity.
I used to always be rushing round, exasperated in traffic, impatient in line at the grocery store. Now The red lights, lines at the grocery store, drive through are all opportunities for yogic practice. A friend of mine always says "take it to your breath" lol I love that. Simple but oh so powerful.