These links will show some usefull information about the main areas of baseball!

 Fielding:
Infield
Outfield
Fly Balls 
Catcher Instruction 

Hitting:
Weight Shift
Weight Transfer 
Hip Slide Identification
Swing Bubble
Stay Back
Squish The Bug 
Hitting Zones 
Rapid Fire
One Hand Soft Toss 
Hips Leading Hands 
Using Your Legs 
Rotational Swing Analysis
Tony Gywn's Swing
Staying Connected

Throwing:
Throwing

Pitching:
Towel Drill