The first exercise is from Whitcomb's Novel Shortcuts in a section on Scenes:
Write a new scene or work with an already-written scene and make sure you have a few different things going on. This adds interest and cuts out the need for many short scenes in which only one event occurs (pps. 146-147). Whitcomb gives an example of combining scenes in which a mother gets into a fight with her husband and has her feelings hurt by a child.
Note if authors you are currently reading do this well and describe what they did and to what effect.