[Low Key]

Read the manual. I think it talks about how to charge up the ball and how a charged ball is more likely to go in, especially with a player with high shooting stats.

If you haven't yet, go thru the story/tournament mode. Especially with a friend. Makes it much easier. (Took 4 people for us to be able to beat the final boss.. ask Ryan Beal, he was there) Also go thru the strategy sections. Even somewhat seasoned players can learn a bit there.