Rule #1: There are no rules.
Rule #2: Don’t let the fuckers get ya.
Rule #3: The production is there to serve the film.
Rule #4: Filmmaking is a collaborative process.
Rule #5: Nothing is original. Steal from anywhere that resonates with inspiration or fuels your imagination. Devour old films, new films, music, books, paintings, photographs, poems, dreams, random conversations, architecture, bridges, street signs, trees, clouds, bodies of water, light and shadows. Select only things to steal from that speak directly to your soul. If you do this, your work (and theft) will be authentic. Authenticity is invaluable; originality is nonexistent. And don’t bother concealing your thievery—celebrate it if you feel like it. In any case, always remember what Jean-Luc Godard said: “It’s not where you take things from—it’s where you take them to.”
Posting these so I don't lose track of them. They're intended for filmmakers but apply across the board. Treat yourself and read them in their entirety.
Found via users illusions.