Providing comprehensive transit information is arguably the most important element of a useful system. Sure, you need to run a reliable service, but people need to know how it can help them and how they can use it. Sometimes you just need a quick schedule check. Sometimes you need to know the universe options. Usually it's something in between. Yet so many bus stops lack basic schedule information, or worse, don't even say what services might stop there.
Maintaining current schedules can be a challenge as they can change often. But the actual routes and their span and frequency rarely change. Make it a goal for every stop to display a route map, an overview of each route's span and frequency, and the operator's phone number and website.