Some simple approaches to Buddhist midnfulness practices include:

Remember: Breath, you are alive.
Be close! Be here now!
Don't worry about it; let it be!
Allow it to blossom, let it happen (naturally)
Just passing through ....
It all comes down to appreciation ....
The best way to prepare for life, or death, is to live well in the moment.
Breathing in, "Yes"; Breathing out, "Thanks". (Thich Nhat Hahn)
Breathing in "Present Moment"; Breathing out "Wonderful Moment" (Thich Nhat Hahn)

Who am I? Am I my ego, mind, or body? Where is mind?
What is the Self? Is Self wonderous, mysterious, imperceptible, and ungraspable?
Is your original mind, your basic, natural, awakened consciousness, Buddha nature?
Is your consciousness and energy within your quiet mind and body?
Is it the same inside and outside? If outside how far does it extend?
Where is the center of my being? What are the limits of my mind?
Is just being awake, the same as fully being, being fully aware?
What is attention? How does it relate to intention and aspiration?

Don't believe anything, pay attention, and do not take it personally. (Sherry Huber, Zen teacher)
When you notice your mind is wandering, note the cause and then kindly return to the present.
If everything changes, including yourself, how can "you" possess or be anything in particular?
"If you meet Buddha on the road, kill him!" (Zen Koan)
Put no one above you and no one below you.