Considering most hollywood movies are interchangeable (the scripts are all written from the same manual anyway), my solution is to not actually purchase anything. If it's on Netflix or HBO, it's fine, otherwise I don't bother. Same for music, if it's streamed somewhere, fine, otherwise no. I get blu rays for really good movies, but they are so rare it ends up very cheap.
When they come up with a guarantee that I can access my digital purchases forever from any corner of the world or solar system, then I'll consider buying digitally from the movie/music industry.