This presentation is aimed at those who have some experience improvising, though all levels are welcome, and is intended to take service playing to its next level. It includes techniques for generating sophisticated harmony at the keyboard by touch alone (a different approach from harmony by Roman numerals), a straight-forward approach to fugal exposition, and exploration of two of Messiaen’s Modes of Limited Transposition. Finally, David Baskeyfield will outline a particular procedure for improvising in sonata form utilized by Vierne and Dupré in the organ class at the Paris Conservatoire.