A heavy wood door like that should have a long screw in one of the three holes of the hinge. The screw is long enough to sink into the framing and helps keep the door from sagging.
Here is a quick how to on door adjusting.
http://www.rd.com/familyhandyman/content/17572/
http://www.taunton.com/finehomebuild...roper-fit.aspx