I monitor differently from most people.
Most people have one large scanner with all the frequencies programmed in.
I use three smaller scanners at a time with my desired frequencies divided among them. There are some good reasons for doing this. For those who don't know about these things, a scanner samples many different radio channels each second looking for activity. When it finds someone talking it stops on that channel and listens until that person stops talking. If something important happens on a different channel while that person is still talking, you miss it because your scanner is locked onto the person talking.