Another very important trick of the trade is how to transition from one key to another smoothly. For example playing a song in the key of C then on the 2nd time around playing it in key of D. Well, how do we transition smoothly in between ? I think there are several ways. The easiest is after the last note of the previous key then play the "F (IV)" followed by "G (V)" chord of the next key. Then you will smoothly transition to the "C (I)" chord of the next key. It almost always works. Anybody else got similar tricks for key transitions ?