WRONG:

CALM, COOL, AND COLLECTIVE

RIGHT:

CALM, COOL, AND COLLECTED

Unless you’re living in an unusually tranquil commune, you wouldn’t be “calm, cool, and collective.” The last word in this traditional phrase is “collected,” in the sense of such phrases as “let me sit down a minute and collect my thoughts.” If you leave out “cool” the last word still has to be “collected.”

List of errors