Dedicated bus lanes in high traffic corridors throughout the city.
Many people are discouraged from riding the bus because the bus is sitting in the same traffic as everyone else. Worse, the bus actually becomes part of the traffic problem. If buses had their own protected lanes, they could bypass traffic - leaving more space for cars and empowering the buses to move faster, which would make them more appealing to commuters.
Maybe take the idea one step further and allow school buses to use the dedicated lanes as well - because they aren't in traffic, it would eliminate the need to stop traffic in both directions when loading and unloading. This would make buses safer for the children while also getting them out of the flow of traffic.