[en] The standard Model predicts sizeable if not even maximal B/sub s/ - anti B/sub s/ mixing; B/sub d/ - anti B/sub d/ mixing is not expected to exceed the one percent level unless top quarks are very heavy (m/sub t/ greater than or equal to 150 GeV). B decays also offer the best opportunity to discover CP violation outside the neutral K system. Employing the standard model one predicts - with reasonable confidence - CP symmetries of up to 20% (or even more in some cases). The branching ratios for the individual exclusive modes of interest are not expected to exceed the 10^-3 level in most cases; the identification of such decays poses non-trivial problems. It is shown that by summing intelligently over appropriate classes of decays one can greatly enhance statistics without jeopardizing the signal. Very similar searches can be performed for D decays