Continuity mistake: When Wendy is looking through all the typed sheets where Jack has typed 'All work and no play makes Jack a dull boy', you can see that they are getting disorganised, and when Jack sneaks up on her, she gets a fright and puts them down in an untidy pile. However, in the next shot, they are in a relatively neat pile again in the tray.
Continuity mistake: When Danny is playing alone in the corridor, with his toy cars and trucks, in the overhead shot, the little vehicles are set up on the orange and brown pattern, as the ball roles to him down the center brown path in the carpet's sextagon pattern. However, in Danny's close-up, when the ball is in front of him, all the little toy vehicles are now set up (still the same way) on the opposite side of the carpet's distinct pattern, as he also faces the opposite way. This mistake has absolutely nothing to do with the ghosts of The Overlook moving the ball.
Continuity mistake: When Hallorann is showing Wendy & Danny around after they first arrive at the hotel, they walk through the kitchen towards the camera & into the freezer door to the left of the screen. You can see the kitchen still visible in the background. When they leave the freezer (after Hallorann calls Danny "Doc"), the background is completely different & the kitchen is not visible. This is because they have actually filmed a different door on the opposite side of the corridor. They then walk towards camera again & back into the kitchen they have just walked through.
Continuity mistake: As Danny is writing 'redrum' on the bathroom door, the lampshade on the nightstand light is askew. A moment later, when Jack is knocking down the door with the axe, the lampshade has somehow straightened itself out. (01:32:40)
Continuity mistake: In the scene where Jack is telling Danny he would never hurt him or his mother, towards the end when the camera is facing Danny, you can't see Jack's right hand and can assume that he's leaning it on the bed; but when the camera moves back to Jack's face it is now around Danny's shoulder.
Other mistake: When Jack Nicholson is talking to the manager of the Overlook Hotel, the manager mentions the death of two girls aged 8 and 10. When Danny sees visions of the two girls they are unmistakably twins, not different ages. A quick look at the IMDb (http://uk.imdb.com/title/tt0081505/fullcredits) proves they are - Lisa and Louise Burns, both born in 1968.