Shoot and work like real filmmakers do: composition, cast, storyboarding, sound, sound, sound, a good story, not using your own kitchen/home/street/etc as location* but go for really good places to shoot, proper editing, etc.
* A lot of short films made for Dvxuser.com festivals have been shot in people's own houses or similar places. You see and feel that immediately when watching those films. No matter what kind of 35mm adapter they've used, it feels just not like 'film'. Film is about 'traveling to other places, following people in their stories' etc. I've seen the best examples of this point in the Russian movies The Return and The Banishment (trailers below):
- The Return: http://movies.virginmedia.com/synopsis/default.asp?filmid=3206&sec=syn
- The Banishment: http://0-a.mymovies.net/player/default.asp?TRID=3867&filmid=7612