Write a quick story where as many words as possible (besides conjunctions and prepositions) begin with the same letter.
Example:
Nancy Nixon, a novice novelist, never needed to nab notions narrated by numbskulls, nuns, noticeable names or normal Norwegians. Nancy was neither notorious nor nuptially nutty. She narrated while nude, numerating known (okay I cheated) non sequitors. Naked and nymph-like, she noted nuggets too numerable in her new novel. Now you've noticed Nancy wasn't narrow or nasty. Narrating to her was a narcotic. Naturally, she was known to nap; napping, in fact, was necessary because she was a notorious narcoleptic. Nodding over her notebook, nerves neutered, she nuzzled and nurtured nouns, nestled like napalm, navigators among the nomad notions.