Don’t O.D. On Villains
As Seen In: Spider-Man 3
Sam Raimi unwisely super-sized Spidey’s rogues gallery for his final Spider-Man flick, pitting the web-head against three villains — Harry Osborn, the Sandman and Venom (although, to be fair, Venom was pushed upon him by the studio) — and the result was an overcrowded muddle that inspired weariness rather than excitement. While some films have managed to successfully make room for two or more villains (Batman Returns springs to mind), in general it’s best to keep a one-to-one ratio.

Read more: Dark Knight Rises: The Do’s and Don’ts for Ending a Trilogy