 This can be a really helpful exercise for people with post-traumatic stress disorder who may want to do it with the guidance of a therapist. You can also use dream incubation to craft yourself a fun little dream. You know, maybe before you go to sleep, you tell yourself, tonight I want to dream about sitting down to an all-you-can-eat buffet made up entirely of dessert. Or I want to dream that I'm having a love affair with my celebrity crush. Worth a shot, right?