Soundtrack
You are marked on how you have used an appropriate soundtrack creatively. So don't just slap your favourite song on top of your footage at the last minute.
1) Think about the tone of music you want to help create meaning in your opening.
2) Find a license free soundtrack - DO NOT USE COPYRIGHTED music, so anything from recording artist or an existing film.
Here is a list of sites where you can find music to use.
3) Edit the music to fit the action and flow of your production.
OR
1) Use Garageband to create your own soundtrack.
Sound FX
The microphones on the cameras are not the best at recording sound - but do the best you can OR use the external microphone available.
To really create a good soundscape use and mix of foley sounds and sound FX in POST PRODUCTION. Freesound.org and www.freesfx.co.uk are both very useful.
Listen and watch this student opening to discover what can be achieved with effective use of sound FX and a simple but effective soundtrack.