Practice, practice, practice. It does take a lot of practice.

The number one thing that I was told when I first started using the baitcaster was this:
Use a little more weight than would otherwise be necessary and apply a little more spool tension than you need with the "spool tension knob."

That will help slow the spool down to prevent it from freewheeling so fast that it fluffs up the line.

As you get better at casting you can start decreasing the amount of weight used as well as backing off the spool tension slightly as you need it.

The spool tenson knob helps prevent with "overspool" at the beginning of the cast. While the centrifugal brakes help prevent overspool at the end of the cast.

Hope that helps. Forgive me if I have stated the obvious or if you have already tried it.

good luck,
Rafterman