Easy points:
You can gain "points" for certain feats performed during a game. An easy way to get a lot of points is to throw a perfect game. This is worth 100 points. Switch controls every time the CPU is up at bat and intentionally strike out. This will get you points for 27 strikeouts, and for a perfect game. Repeat as many times as needed. To get more points in franchise mode to sign your free agents, during the off season either create a player and pick him up as a free agent or sign free agents and release them at the end of the season.

Control homerun replay:
After hitting a homerun, a replay of it will be displayed. When you see your batter heading home from third base, press various buttons (except A) to see different angles.

Improve your hitting:
Immediately after the pitcher releases the ball, press Start. You will see where the ball is going and if it will be a strike or ball. Resume the game and move your batting cursor over it to get a nice powerful swing. This will help you improve your hitting. Note: You do not need to press Start directly after he lets go of the ball, it just gives you more time to move your cursor after the game is resumed.