Go though the course again. Stop the tape and do all the exercises again. This is how you begin to get better at it.
The use the system whenever the opportunity arises, everyday. Pick a book and activate it using the 5 day test/plan (page 76 of the PhotoReading book). Try syntopic reading, select one book to activate from those 4 or five.
Naturally it will depend on your schedule how much time you spend using the system. If you spend up to 30 minutes a day using the 5 day test your skills in using the system will improve.
Alex