To stay or go? To meet and how? What's it worth? Risk calculators from academics and others are helping members of the general population make up their minds about going out and doing things. Decision fatigue applies to business development, networking and training as much as it does holiday family gatherings. If you have had enough, maybe you can leave some thinking to a calculator. Scott Gillespie's is out of the prototype phase, and he's looking for a corporate sandbox or . . .