Actually, it is OM or AUM. From what I have learned it is the "sound" of the vibration of our wonderful universe. And more! Om linky

Won't you join me? Aaaaaaauuuuuuuummmmmmm

It seems I have a new one all the time! haha

I like the one from master key:

"I am whole, perfect, strong, powerful, loving, harmonious and happy."

-ref

Live and Love Life. Enjoy and Learn from it.

I feel incredible!

Just like Michael, I also chose OM. It was the first "word" my first-born child uttered. It means 'mother' in arabic, which is one of my two native languages. It embodies, just like a mother, unconditional love. It also encourages me to focus on the task at hand.

Thank you, namaste

Aside from the mantras listed above, I use a few others. Thank You Thank You, One with the One, Bless Bless Love Love Bless Bless Love, Love All Love One Same Moon Same Sun, and God God God God God.

Peace

I like the master key mantra, when I use it, I affirm with a "yes!" at the end with feeling.

I also use "Feel, Focus, Flow" - when I need to be still and bring myself back to the present moment. (I actually wrote a blog on it a while back: http://tinybuddha.com/blog/feel-focus-flow/ )

Great question!

Sukh :)

My "Mantra", if I had to say I had one, is from Psalm 51:10-12 (King James). We used to sing these verses in Church, and I hum it whenever I need to feel God:

Create in Me a Clean Heart, Oh God;

And renew a Right Spirit within me.

Cast me not away from Thy Presence,

And take not Thy Holy Spirit from me.

Restore unto me the Joy of Thy Salvation,

And Uphold me in Thy Free Spirit.

Amen!

Jai P.S. I also recommend saying the Rosary, if you swing towards that belief...the Rosary is designed to put One in an altered state.