What did you like about it?
If you liked the story, I highly recommend all of screenwriter Charlie Kaufman's other movies, starting with Adaptation, Being John Malkovich, and Eternal Sunshine of the Spotless Mind.
If you liked Nicolas Cage, you might also try two of his most recent movies, The Unbearable Weight of Massive Talent and Pig, or even his older movies like The Rock, Con Air, Face/Off, etc. if you haven't seen them.