Any tips to stop my dog from marking in the house?

hi i found this on the net and it helped me Catch him in the act! DOGS LEARN QUICKLY FROM THIS Close supervision is necessary. You must be dedicated to stop the marking behavior of your dog and you must be consistent. A couple of weeks or often much less time of intense supervision and correction can save you a lifetime of tearing your hair out trying to find a quick fix for the problem. Some people have reported that it has only taken a day or two using the intense supervision method. Confine your dog to one area of the house where you can watch him. Shut doors to other areas of the house or barricade them off with baby gates or improvise with whatever is at hand. If barricading is not possible another option is to put your dog on a retractable lead while he is in the house with you and for you to have total control at all times. hope it works for you also