The most beneficial practices so far, have been loving-kindness, and the subtle mind.  It is actually a hybrid of the two for myself.  I can focus solely on breathing for a short period of time, usually about one minute, that makes it easier for me to start the loving-kindness exercise.  I have actually begun to use the loving-kindness exercise on a regular basis, a shortened version, or combat version.  I have been able to envision my "happy place" while still carrying on a conversation, and this has proved to be very helpful.  I deal with the general public on a daily basis and depending on frustration levels, communication can become difficult.  Taking the time out during the day to do some visualization has really helped.