Annotate this sheets to plan where you need the different parts of your audio track - dialogue, music, ambience, sound FX. Use different colours, explain what you are going to use.
Use this Sound Sourcing sheet to organised what sounds you need for audio track and where you intend to source them from - this could be composing it yourself, foley sound creation, a sound library, on set recording (for maybe ambience and dialogue) or post-production dubbing/recording.