Are there specific techniques to learning it, or is it just experience? For example, do you have to be very familiar with the specific weapon you're using? Does "visualizing" help? Are there tricks or points of reference that you use to help out?
If you want to get into it, I recommend two things: first, find someone who does thrown weapons and can talk you through the basics and point out mistakes in your form (SCA events are a great way to do this, and that's how I got into it), and the second is just to get a slice of a tree trunk and some weapons and start practicing regularly.
I found it to be a great way to relax and get my brain away from tech. It's one thing I miss in moving to NYC.