The Sanskrit word for discipline is pratyahara. Often translated as "sense withdrawal," pratyahara is the ability to turn your attention inward, so you are focusing on your center.
It really doesn't matter what you do to take your attention inward. You could tune into your breath or stop mid-stride to feel your feet on the ground. Or you could take a moment to remember the interconnectedness of everything. As you do, you should notice a thread of connection to the part of you that is not totally caught up in the drama of the moment. As you touch that open presence, you touch your deepest source of strength. In that state of stillness, recall your intention. Then act or speak in a way that's congruent with that intention. You'll find, in moments when your intention and motivation are clear, that these intentions will bring you inner strength. This strength is an infallible source of support—the support that never leaves you.