Trivia: When Rey has her vision after touching Luke's lightsaber, she hears a voice at the end that says, "Rey, these are your first steps." The voice that says "Rey" was a partial sound bite taken from the late Sir Alec Guinness saying "afraid," and Ewan McGregor came in to record "these are your first steps." So you're hearing both the voice of old Ben Kenobi and young Obi Wan Kenobi speaking.
Trivia: General Hux never blinks throughout the movie.
Trivia: A model of the tumbler from The Dark Knight trilogy is spray painted on the white hull of the Millennium Falcon, and mounted to its underside. This is because there was a friendly competition between JJ Abrams and Zack Snyder to see who could one-up the other by putting Batman/Superman references in Star Wars and vice versa.
Trivia: In Rey's force vision, before she sees R2-D2 and Luke's robot hand, she runs down a hallway - the same one from The Empire Strikes Back during the final lightsaber duel between Luke and Darth Vader. This sequence was originally going to be longer, with her seeing the duel itself from a new perspective (one of the reasons Darth Vader is one of the Force Awakens toys).
Trivia: This is the first J.J. Abrams movie not to have a music score by Michael Giacchino.