What is a scene?
a) A scene starts and ends in one place at one time (the Aristotelian unities of time and place–this stuff goes waaaayyyy back).
b) A scene starts in one place emotionally and ends in another place emotionally. Starts angry, ends embarrassed. Starts lovestruck, ends disgusted.
c) Something happens in a scene, whereby the character cannot go back to the way things were before. Make sure to finish a scene before you go on to the next. Make something happen.
~Janet Fitch