Pair your breath cycle with the meditative phrases/instructions and then drop to the individual word. You can choose how much time you stay with each instruction depending upon how long you wish to practice. You can also utilize this as a recitation, pairing each instruction and singular word with your breath cycle for one round.
Breathing in, I know I am breathing in Breathing out, I know I am breathing out.
(Inhale) In (Exhale) Out
Breathing in, I see myself as a flower. Breathing out, I feel fresh.
(Inhale) Flower (Exhale) Fresh
Breathing in, I see myself as still water. Breathing out, I feel clear.
(Inhale) Still water (Exhale) Clear
Breathing in, I see myself as space. Breathing out, I feel free.
(Inhale) Space (Exhale) Free
~From the book: The Blooming of a Lotus, by Thich Nhat Hanh
Find a comfortable seat that establishes a balance between effort and ease or lie down and invite deep relaxation into your whole being from the crown of your head to the tips of your toes. In either position, you can lightly scan the body to observe where you are holding tension and whether it is serving you or whether it is okay to release it.
Observe the natural flow of breath, noticing the inhale, the slight transition, and the exhale. Match the mantra to your natural inhale and exhale. Begin with the first line of instruction saying it to yourself internally or out loud, as you prefer. Say each line of instruction fully twice, then consider dropping the full instruction to the core words (e.g., in, out; deep, slow; calm, ease; healing release). You can decide how long you wish to practice one instruction before moving on to the next.
At the end, pause to notice any impact from your practice. Consider placing one hand over your heart and the other over your belly and invite a felt sense of kindness and warmth into your hands. Feel the breath under your palms, easy and gentle. Remind yourself: present moment, safe moment.