An effective counter-thought could remind you of those who are rooting for you. Remember, all you need do is ride out two to four minutes of illogical urges. How you answer that question will determine your results. One of the reasons people so often don't stop smoking, or can't stay stopped, is because they have not learned to cope with the stresses life throws at us. Deep breathing to quiet the mind and relax the body is an excellent way to cope.
Most people hold their breath.
Even under ordinary circumstances, most of us tend to be very shallow breathers. It's not called the breath of life for nothing. At first, when you consciously take the deep breaths, it may feel strange. The internal chatter of a nicotine-fit may threaten to destroy your peace of mind but this will not last. You step outdoors on your work break.