People have addressed this in many different ways, most commonly by adding a small light. There are some individual devices that do this very well, or some people have made their own.
See the following recent discussion:
In addition, you can use the quick browse lists in the community – created wiki, look down near the bottom of that page for the “project report” section and then choose the list for “alerts.” This will bring up a list of the number of different topics that might be of interest.