When priorities change rather quickly, I do a quick inventory of what the priorities are that have changed and what needs to be done to make sure that everything is dealt with in a timely manner and is done to the satisfaction of everyone involved. An example of this was at my previous job I was responsible for setting up seminars and events and one time we had a seminar where we had to rather quickly change the location due to an incident at the location. There was a fire that caused it to be no longer available at the time. So instead of having to work out the rest of the details I was working on, which was booking travel and flights and hotels for everyone, I had to quickly stop that and then find a new venue that met all of our criteria. And thankfully I did and altogether the seminar worked out well.