[en] Suggestions for efficiently determining the lifetimes and mass difference of the light and heavy B_s mesons (B^L_s, B^H_s) from B_s→J/ψφ, D^*+_sD^*-_s decays are given. Using appropriate weighting functions for the angular distributions of the decay products (moment analysis), one can extract (Γ_H, Γ_L, Δm)_Bs. Such a moment analysis allows the determination of the relative magnitudes and phases of the CP-odd and CP-even decay amplitudes. Efficient determinations of CP-violating effects occurring in B_s→J/ψφ, D^*+_sD^*-_s are discussed in the light of a possible width difference (ΔΓ)_Bs, and the utility of this method for B→J/ψK^*, D^*+_sD-bar^* decays is noted. Since our approach is very general, it can in principle be applied to all kings of angular distributions and allows the determination of all relevant observables, including fundamental CKM (Cabibbo-Kobayashi-Maskawa) parameters, as well as tests of various aspects of the factorization hypothesis. Explicit angular distributions and weighting functions are given, and the general method that can be used for any angular distribution is indicated. (author)