It may be a little late for this, however, if when you first get a dog take them out on a leash to the area where you want them to "go". They will get in the habit of going there to do their business. Also gets them used to relieving themselves on a leash :)

I have four dogs...two males...I buy a urine nutralizing table at tractor supply....They like it..think its a treat and it has solved the urine problem...