For the hard-hit serve, use a motion similar to what you use for your stock serve, but this time swing through faster and hit a little lower on the front wall. The backhand serve is useful from the right box (the left box for a left-handed player), but has very few advantages from the left box. Hit 10 serves from the right box and 10 serves from the left box.
When returning serve, he stands up in the court and hits lots of kill shots, a special favorite being the crosscourt volley kill shot into the nick. The attacker will seize on crosscourt shots, hitting a straight kill shot that will force you to run the diagonal of the court to stay in the rally. Also, most attackers hit great volleys off hard-hit crosscourt shots or loose straight drives but do not volley as well when moving backward and when the ball is high above their heads.