In one embodiment, a method includes receiving real-time sensor data from a number of sensors of different sensor types on a computing device. The real-time sensor data corresponds to a transition in a physical state of the computing device caused by a user of the computing device. The method also includes correlating the real-time sensor data from the number of sensors of different sensor types on the computing device; determining based on the correlation an intended imminent use of the computing device by the user; and automatically initiating based on the determination a pre-determined function of the computing device.