In this exercise I talk about how to transpose by focusing on common notes and the chords in each key that lead to the I chord. There is also a chart that contains the scales and transition/dominant chords of all twelve keys.
FreePianoPlayingTips.com offers some free practical e-mail video lessons from virtuoso teacher, Yoke Wong. She also has some excellent DVD lessons and books that may be purchased as well. A another great choice for those wanting to take their improv to another level. Check it out!
GospelPianoToday.com is another incredible site if you are looking for great DVDs that teach practical improvisation for contemporary gospel styles of music. A good choice!