Last month, my wife and I had a “no-money weekend.” The rules were simple: survive from Friday night through Sunday night without spending a dime. Of course, there were some lingering questions. Did driving count as spending if we were going to a free event? What about gift cards—could we use those? (Hint: No.) This sums up a lot of truths about money: the concepts are simple, but the execution is complicated. At Future Advisor