There is nothing to writing. All you do is sit down at a typewriter and bleed. (Ernest Hemingway)

Here is some information on parallel structures and here is some more. Why not try this quiz on parallel constructions which I found at www.proprofs.com? You can find many examples in famous quotes. Winston Churchill, for example, was quite adept at parallelism: The inherent vice of capitalism is the unequal sharing of blessings; the inherent virtue of socialism is the equal sharing of miseries.