Ask HN: Similar Book to Power of Now / Tolle?

Psycho-Cybernetics by Maxwell Maltz

Have you tried reading it again?

I'd suggest Peace Is Every Step: The Path of Mindfulness in Everyday Life by Thich Nhat Hanh

raptitude.com is a great source of articles to remind you of the things that were compelling to you at any point about mindfulness and/or meditation. I also recommend the spin off http://campcalm.com if you're interested in meditation in particular.

If you're after books specifically, "Wherever you go, there you are" by Jon Kabat-Zinn is also good.

Check out Rupert Spira. He's a bit more hardcore than Tolle but in the same genre (nonduality). He's also got some good videos on YouTube.

Interesting - hardcore in what sense?

Autobiography of a Yogi by Paramahansa Yogananda

Erich Fromm - The Art of Loving, Escape from Freedom, To Have or To Be