Place your attention in the palm of your hand. Notice the sensations of the air on your skin. You may feel a tingling there. While you do this you can listen to people talk. You can respond and still have your attention in the palm of your hand. No one knows that you are meditating. I have used this technique for years to meditate in public.
©2016 Stephen L. Martin
Painting: Bodhidharma by Yoshitoshi