Here is a guided visualization exercise for mindfulness of breathing:

Take a few deep breaths, letting your belly rise and fall. Feel the air moving in and out.

Now, bring your attention to your breathing throughout your daily activities. As you move through your day, notice the breath flowing in and out, in and out.

When you're walking, feel the breath moving in and out in sync with your steps. As you eat, be aware of the breath accompanying each bite and swallow. During conversations, tune in to the ebb and flow of the breath as you listen and speak.

Anytime your mind wanders, gently bring your focus back to the sensations of breathing. Let the breath be an anchor, grounding you in the present moment, no matter what you're doing.

Breathing in, breathing out. Breathing in the world around you, breathing out the present experience. Each inhale and exhale connecting you to the here and now.

Take a few more deep breaths before continuing on with your day, carrying this mindfulness of breathing with you. Allow it to infuse all your activities with a sense of presence and calm.