So I'd like to see a list for both Triggers and Action Groups of when Indigo used them last. The best place to see this info is obviously in the main menu, much like the columns for Folder, Trigger ID and notes. In adding devices and working on automation routines, I frequently create Triggers and Action Groups to cover all the bases I can imagine at the time of creation, only to find out a year later I've never used some of them. Having a "Last Used" column would allow us to see what Triggers and Actions groups haven't been used, and consider deleting them, just to help keep Indigo as "clean" as possible. The more un-used Triggers and Action Groups around, the harder it can be to do troubleshooting.
Additionally, might be nice to have a column of when Triggers and Actions were created, and when they were last modified, in addition to when they were used last.