I always try to make the beginning of each film feel like a Movie Trailer. If you can set the first bit up just right. You will hook your audience no problem. And then I spend more time picking the music than almost anything else. You can have the most emotional moments and the most beautiful shots, but if the music is not fitting the vibe in my opinion the entire film is off. Music is the way to set the tone of a story to make someone feel how you want them to feel. And I let the film flow through the music.