Now that you have nearly finished, think about what you have recorded so far. Sometimes it is beneficial to get an outside person to watch what you have done and give constructive criticism. Be sure to credit found footage or borrowed clips!
For additional links and sources that you might find helpful, go to this link.
Search for Creative Commons licensed content through Google, Flickr, SpinXpress, Wikimedia Commons and many other sites.
If you are planning on filming, using their image or just their voice, it is important to get their signed consent. Here are sample release forms that you can use. In the outside world, it is usually expected that you know this when going into a job or working in the field.