Blocked Designs

When I first learned about randomized complete block designs as an undergraduate to me it was just another set of computations to memorize for the test. (this was before I understood statistics as a way of thinking not a box of tools) . However it is an important way to think about your experiment. In Steel and Torrie's well known experimental design text, they discuss: "in many situations it is known beforehand that certain experimental units, if treated alike, will behave differently....design