This is actually something I only learnt on the 19th of August, 2009. Yes, I remember the date, it's an important date. This is after having a DSLR many years, and never being able to effectively shoot moving subjects. I would resort to doing things like:
- Stopping down, therefore increasing the depth of field, such that the moving subject might still be in focus.
- Increasing the shutter speed ('cause clearly I didn't understand the difference between motion blur and just plain out-of-focus).
- Pre-focusing in front of a moving subject.