  We develop the analytic bootstrap in several directions. First, we discuss
the appearance of nonperturbative effects in the Lorentzian inversion formula,
which are exponentially suppressed at large spin but important at finite spin.
We show that these effects are important for precision applications of the
analytic bootstrap in the context of the 3d Ising and O(2) models. In the
former they allow us to reproduce the spin-2 stress tensor with error at the
$10^{-5}$ level while in the latter requiring that we reproduce the stress
tensor allows us to predict the coupling to the leading charge-2 operator. We
also extend perturbative calculations in the lightcone bootstrap to fermion
4-point functions in 3d, predicting the leading and subleading asymptotic
behavior for the double-twist operators built out of two fermions.
