One exercise I remember from high school was to write instructions for how to make a peanut butter and jelly sandwich. Other students would then stand at the front of the class with bread, a knife, and jars of PB&J, then try to follow our written instructions as literally as possible, not making any assumptions. This was an activity we were all obviously familiar with, but it was amazing how poor most of the instructions were, omitting all kinds of details.
