Landing on a "heart space" will require you to choose a heart card from one of two decks. These cards hold anywhere from small rewards to horrible consequences. Some cards you will be able to retain for later use when you get into an "unhealthy" situation and others will demand action be taken right away. Keeping track of which deck was selected from last, and whether the selection was a good or bad event, can be helpful to better your chances of getting a good card, but it is certainly no guarantee.