One form of meditation is to observe your breath. "Ana-Pana-Sati". A lot of people practice this form of meditation, yet they don't feel calm. They easily get perturbed by the ups and downs of life.
Understanding meditation could mean knowing well what leads you forward and what holds you back. keep dwelling over it again and again. Use this knowledge for reaching the path that leads to equanimity (calmness and composure especially in a difficult situation). Keep Meditating