Do you have pain between your shoulders? It's possible that your chest muscles (pectoralis major) are too tight and the muscles between your shoulder blades (rhomboids) are overstretched from the patterns of doing everything in front of us - computer stuff, sitting at a desk all day, etc.
It's easy and you can do it anytime you walk through a doorway. First off, mentally scan your body and see if you can sense the area between your shoulder blades and your chest.
This is a very easy thing to incorporate in your day at work to counteract all that sitting and forward shoulder rolling. In order to make it a habit, tie to something you do throughout the day, like every time you go into your break room or to the bathroom.
Happy stretching,
Kathleen