By the time you are a level two outfielder, you want to be able to reach at least all of the "routine" fly balls. It is important to get a lot of repetitions with fly balls to practice reading the angle of the ball in order to predict where it will come down.
You can practice this with shorter drills, such as taking wiffle ball fly balls, football drill, etc.; then, practice taking standard fly balls.
As you work on the angles, keep in mind that the objective should be to run to the location where the ball is going to land, rather than trying to run with the ball as it is overhead. Remeber your geometry: the shortest distance between two points is a straight line! Your route should take you in a straight line to two steps behind where the ball is going to land so you can reposition for your throw.
Level 2 Outfielding - Crow Hop
At this point, having learned how to set yourself up to come through the ball, with your route on a routine fly ball taking you in a straight line to two steps behind where the ball is going to land and with your hips and shoulders facing where you will be throwing, you are set up for a "crow hop".
With your hands above your throwing shoulder and your throwing foot one foot-length behind your glove foot, you should take a huge step up and forward with your throwing foot and pull your hands down as the ball lands in your glove. Your throwing foot then becomes the plant foot as you bring your hands up and spread them (with throwing arm fully extended with the thumb toward the ground). As your glove foot lands, you will finish your throw as you come from over the top and "pull down" through the throw.
Level 2 Outfielding - Reading the Ball
As you are learning to increase your range by taking the shortest route to the ball and learning to get behind the ball and crow hop through it to make a good throw, you can also learn to read the ball earlier and more accurately.
Try to time your body so that there is a very slight "wiggle" and a slight crouch as the ball is being pitched through the hitting zone. Also, you should try to train your eyes to read the ball into the hitting zone so you can react at the earliest possible moment.
As you learn to read the ball more accurately, there are four variables to account for: vertical angle (up/down), horizontal angle (side to side), acceleration and sound. It is more difficult to judge the ball hit directly at you because there is no horizontal angle to help you read the ball. Sound (especially with wood bats) can help to determine if the ball was hit on the sweet spot of the bat or if it wasn't.
