Really great copy and design is often created very quickly, in a creative volcanic burst. You may think it's the opposite -- that great work needs time to develop and ferment. The truth is that the developing and fermenting happens subconsciously, before the creating. Then the writing and designing happens, or should happen, quickly. Passionately.
A great example of this is the Beach Boys classic, "G-d Only Knows." It broke the mold. It made Paul McCartney in 1966 call it the greatest love song ever made. It even inspired the Beatles' Revolver album (McCartney tried to compose his version of "G-d Only Knows" in "Here, There, Everywhere," falling far short of the originality and goose-bump causing beauty of Brian Wilson's "G-d Only Knows.")
The point? Brian Wilson wrote one of the top 5 greatest rock songs of all time in only 30 minutes.
The lesson is great copy and design can and should be created quickly in a flow of passion and conviction. Then it will be read with passion and conviction. What takes time is the revision. In other words, the original creation should happen quickly, but you should take your time with the revisions, perfecting your concept. After the 30 minutes it took for Brian Wilson to write "G-d Only Knows," you can be sure he spent countless hours in the studio turning it into the timeless masterpiece it became.
