  The identification of the flavor of a neutral $B$ meson can make use of
hadrons produced nearby in phase space. Examples include the decay of
``$B^{**}$'' resonances or the production of hadrons as a result of the
fragmentation process. Some aspects of this method are discussed, including
time-dependent effects in neutral $B$ decays to flavor states, to eigenstates
of CP and to other states, and the effects of possible coherence between $B^0$
and $\overline{B}^0$ in the initial state. We study the behavior of the leading
hadrons in $b$-quark jets and the expected properties of $B^{**}$ resonances.
These are extrapolated from the corresponding $D^{**}$ resonances, of whose
properties we suggest further studies.
