How to get more speed and spin on your forehand topspin attacks

Some table tennis players have blistering forehand attacks. Blink and the ball is past you. Other players have steady forehand attacks. They can get the ball on the table consistently, but their attacks lack the speed and spin to really give you any trouble. What are the strong forehand attackers doing, which the weaker forehand attackers are not? Here are my tips on how to get more speed and spin on your forehand topspin attacks.