I have a few doors in my house that tend to stick when you try to open them. A few of these I was able to fix by tightening loose screws or repairing stripped screw-holes, which got the hinge plates to sit flush against the frame.
However, there are still a few doors that stick. I've noticed all of them have a larger gap on the hinge side than the latch side, as seen in the photo below:
(Click for larger image)
In all cases, I have confirmed that the hinge plates are flush and properly secured to the frame and the door. I have also noticed there is space between the hinge plates.
How do I go about fixing this?