  We consider HQET including the first order correction in 1/m. A strategy for
the computation of the b-quark mass is discussed. Only two quantities Phi_1/2
have to be considered in order to match QCD and HQET, since the spin-dependent
interaction is easily eliminated due to the spin symmetry of the static theory.
Quite simple formulae relate the renormalization group invariant b-quark mass
(M_b) to the B-meson mass. All entries in these formulae are non-perturbatively
defined and can be computed in the continuum limit of the lattice regularized
theory. For the numerically most critical part, we illustrate the cancellation
of power divergences by a numerical example. Numerical results for the 1/m
correction to M_b, are presented in a companion talk.
