Evolving Ideas

After watching a film, "Law Abiding Citizen" at home, I now have an outlined idea of how I would like my film to look. Having analysed these two films I have decided that I quite like the idea of using a dream-like sequence, as I feel that this could be really expressive and effective interpretted in my own way. I don't yet have any ideas as to what the theme could be but I like the idea of having random sequences put together, I will however need to make sure that it is obvious to the audience that it is a dream.