No plan can prevent a stupid person from doing the wrong thing in the wrong place at the wrong time - but a good plan should keep a concentration from forming. ↗
One blob of red in the wrong place and the audience isn't looking at the hero, they're looking at a patch of curtain (or something similar) and your whole effect is lost. ↗
Fruit often ends up rotting in the crisper drawer. Well, that's the wrong place to put it. Out of sight, out of mind. The kids all know where the junk-food shelf is. Make the fruit that easy to get to. Put a big huge bowl of fruit on the counter. ↗