Take time out of your busy day and sit still by yourself in quiet solitude.  Learn to breathe and focus on yourself being in the present.  The key is to let the mind go.  Start with 5 minutes then increase the time slowly until you yearn for more.  The time will fly by and soon 20-30 minutes will feel very short. As you practice this more and more you will remember the feeling and sensations you achieve through this and apply it in your daily activities (eg work meetings, social gatherings, dealing with people, etc).  

Remember that your mind and body are one and both need exercise.