Create a list for your final project. Initialize it in a handler (if it is a local list) or in the startMovie script if it is global. It can be a list of cast member names that are images or movies or sound files. It can be a list of random numbers to reveal or turn off selected sprites. It can be a list that keeps information on point values of game characters, or a list of user information you intend to keep.
Write a script that uses that list. Try to write a custom handler/function and then use call that handler in one of the event handlers (enterFrame, mouseUp, etc.). See the list examples for ideas (ist example.dir or listexample.zip).