  We obtain approximate solutions defining the mobility edge separating
localized and extended states for several classes of generic one-dimensional
quasiperiodic models. We validate our analytical ansatz with exact numerical
calculations. Rather amazingly, we provide a single simple ansatz for the
generic mobility edge, which is satisfied by quasiperiodic models involving
many different types of nonsinusoidal incommensurate potentials as well as many
different types of long-range hopping models. Our ansatz agrees precisely with
the well-known limiting cases of the sinusoidal Aubry-Andr\'{e} model (which
has no mobility edge) and the generalized Aubry-Andr\'{e} models (which have
analytical mobility edges). Our work provides a practical tool for estimating
the location of mobility edges in quasiperiodic systems.
