There is circumstantial evidence that our universe is merely a pocket in an eternally inflating multiverse containing a diverse array of other pocket universes. In this picture, predicting the expectation values of independent observables requires regulating a diverging number of events. I'll discuss one such spacetime regulator, the scale-factor cutoff measure, and comment on how it avoids certain phenomenological pathologies that plague other regulators. I'll describe this measure's explanation of the cosmological constant, and provide a toy-model prediction of the curvature parameter in our universe.