When Pacey is at Buzz's house making meat loaf, his sleeves go from pushed up to long between shots.
When Joey and Pacey are in the car ride home, a piece of Joey's hair alternately goes from tucked behind her ear to untucked between shots multiple times. Because the shots change so fast, it is unlikely that Joey would have pulled her hair out from behind her ear, then tucked it back behind it within a matter of seconds.
When Pacey pulls off the road, the car follows tire imprints from previous shots.
In the opening scene Pacey drives Joey to the train station while he is driving down quaint Capeside, you see two lane traffic with 6 cars behind them. All car shots they show, the car nobody is behind them and they are driving down one lane.