Open the door and check that the hinge pins are seated all the way within the hinge.
How to fix a door hinge that keeps closing.
Use a screwdriver to tighten the screws attaching the hinges to the door and the door frame.
Tap the screwdriver with the hammer until the pin pops up from the hinge and can be removed by hand.
Tap it with a hammer forcing the nail out the top of the hinge.
Adjust the hinge to have it align correctly and snugly with the door and frame.
Remove the pin by placing a screwdriver under the middle hinge.
By bending the hinge you have increased the internal resistance within the hinge so it keeps the door from moving as easily as before.
If a door binds open it grasp the knob and lift up to see if a hinge is loose.
If you have a really crooked frame and still need just a little more resistance remove another hinge pin and perform the same magic.
The door should no longer move itself.
How to fix a door that swings shut.
Place a large nail or small screwdriver on the bottom of the center hinge pin of your door.
If one is loose remove two or more screws and try driving in longer screws.
If not align the hinge knuckles and tap the pins.
If your door has only two hinges close.
Check to see if the hinges are aligned correctly before you take the hardware off the door completely.
On the latch side a door is cut at a slight bevel to make it easier to close.
The easiest fix is to remove your middle hinge pin and put a slight bend in it.