Tighten all hinge screws on the door and frame
Replace any stripped screws with longer screws
Check that the hinge leaves sit flush against the door and jamb
Loosen the hinge screws slightly if adjustment is needed
Shift the door up, down, left, or right until the gaps are even
Insert thin cardboard, paper, or hinge shims behind the hinge leaf if needed
Remove material from the hinge mortise if the hinge is sitting too deep
Use longer screws in the top hinge to pull the door into alignment
Use a screwdriver to adjust the hinge pins if the hinges are adjustable
Test the door swing after each adjustment
Recheck latch alignment and make final screw tightening
Replace damaged or bent hinges if alignment cannot be corrected