(Post 16) Ancillary Task research

What makes a film poster/music album cover stand out from others?

In what ways can you think of film posters/music album covers linking to the film plot/music video/song themselves?

How much of a marketing tool do you consider a film poster and album cover to be?

As a consumer, what hints/tips can you give us in regard to making our own posters and/or album covers?