Here's an outstanding baserunning drill that my assistant coach brought to me.
Runners start at home plate.
Take a swing, round first properly taking a wide, aggressive, turn and dive back into the first base bag. Runner gets up quickly, takes an aggressive lead, and takes off to steal 2nd sliding into the bag. Next, the runner gets up, takes an aggressive secondary lead and dives back into the bag. He then steals third repeating the slide, getting up and taking an aggressive lead off third. Be sure that the third base lead is in foul ground, and that the dive back into the bag is coming back on the foul line in line of the catcher s throw.