This is the primary practice strategy to use while practicing all pieces. Watch the video for details on how to use this method.
Say: the rhythms on rhythm syllables (ta's or numbers)
Sing: the note names of the piece
Play (5x): the piece on your instrument - repetition is key to success
EOEC is a warmup exercise to work on using proper technique while playing your instrument. First, do the technique with your eyes open, to make sure everything is working correctly. Second, repeat the exercise again, with your eyes closed, to make sure your muscles are performing the technique correctly. Use your ears to check, and fix any mistakes through feel, rather than with your eyes.
The puzzle method is a secondary practice method that you use when Say, Sing, Play (5x) doesn't work, or you have a particular section of a piece that you are really struggling with.