Create.lds.org allows you to contribute your work in the following ways:
•Photos
•Videos
•Music
•Audio
•Design
•Writing
•Casting
•Contests
Just visit the site and click on the tab you're most interested in. Each tab shows you how to get involved and what is needed to submit, and each section even has galleries, spotlights, and tips and tricks. For example, you may be able to create something as simple as a video where you stand in front of the camera and share an experience you had in living the gospel or as elaborate as gathering footage of events happening in your area.
Not sure what to submit? Check out the "Current Needs" section for submission ideas both immediate and ongoing. And be sure to check regularly for updated "Current Needs."