Reservoir computing is a recurrent computing architecture particularly suited for implementation on photonic hardware, especially in its time-delay (time-multiplexed) implementation. Here, we review our effort in timedelay reservoir computing based on a single nonlinear node consisting of a silicon microring resonator. We focus on relating the physical effects taking place in the resonator to the computing performance, as well as proposing extensions of the standard scheme to allow for increased computing efficiency, e.g. through task-multiplexing, or reduced footprint, e.g. through input-multiplexing.