Cycle of Keys Diagram – Use as a visual reference for practicing scales, chords, patterns, licks, etc. moving through key centers in various ways. Please copy, share, and use freely (or better yet: memorize!). See the Cycle of Keys Lesson for a more thorough explanation and examples.
Metronome Online – Don’t own a metronome? Now you have no excuse! A free virtual metronome.
Ear Trainer – A very cool online ear training program.
Musictheory.net – Music theory and ear training tutorials, exercises, and tools.