I assume you're using the phrase "Organizing Ideas" in a subjective sense. If you are referring to some story, book, or play then I can't help unless I know what it is you're referring to. However the importance of organizing ideas in general corresponds to the availability of what it is you're organizing. Organziation that is done in the right context can allow you to floursish later when searching for an idea that you might have not have needed at that specific moment. Organizing ideas will naturally allow you to work more effeciently.
Sorry this isn't two to three sentences : )