1. Watch the film multiple times to get a sense of what's going on in the film and what rhythm would suit it. Also you could watch it without sound and try to imagine what's sounds would suit the action.
2. Chose the instruments and atmosphere. Determining what atmosphere you would like helps you think of the instruments you could use.
3. Make the rhythm and speed adapt to the speed of action.
4. The music for the film is about emotion. Try to reflect the emotions the producer was trying to portray.
5. Don't ask for feedback. Asking for feedback might stop your thinking process and/or direct you in a different direction.
Hans Zimmer and Christopher Nolan worked together to make the ambient noise for The Joker. They did a lot of different experiments using different tools. Hans was sent stills of what the Joker looks like and what he was doing by Christopher to give him a feel of the Joker. Hans tried to create tension using razor blades and string. He then thought of using two contrasting notes. He used a cello and guitar. Hans didn't want to make a happy typical blockbuster. He wanted to make something that people wouldn't like and he wanted to make something that was over the edge. Hans Zimmer wanted the music to have a punk influence, the feel of the Joker and to be completely different to the other music in the film. I think that the final score works very well. It makes a lot of tension and darkness for the character which was what Hans and Christopher wanted to portray.
Information taken from:
http://www.wikihow.com/Compose-Music-for-Film
