There are several ways to do this.
Some people tune the playing head a little bit higher than the sounding head.
Others do the opposite. I go back and forth but tend to tune the playing head about a step higher than the other. In any case you have to be sure that the head is tuned to itself by making sure that the pitch at each lug is the same. I do this by ear or sometimes use the Drum Dial found at most percussion stores. Than I try to get the lowest pitch that I can on plastic heads without sounding like paper.