Review your interview notes. If you recorded the interview, transcribe it. While this process takes time, it forces you to slowly digest the information and see how it reads in print.
Choose the information relevant to your story. For example, your subject may have told you a moving story about losing his dog when he was a child, but if the story is about health care, this anecdote is irrelevant. However, personal details may be telling of your subject's character and allow the opportunity for metaphor. For example, that same story about the lost dog may prove useful if you write a feature story about why the subject became a police officer in a missing persons unit.
Look for memorable quotations throughout the interview. A good quotation doesn't just give factual information -- that type of information is best paraphrased by you. Good quotations demonstrate your subject's personality and may put things into relatable terms. For example, don't include a quote in your story that says, "I was walking down the street to the corner store." Save the quotation marks for this sentence: "When the shots hit my bulletproof vest, it was like being hit with a tack hammer." Incorporate strong quotations throughout your story so that your source's personality or the overall story's angle shines through.
Paraphrase information. As the reporter, decide how to present information -- this gives you a major responsibility to be accurate. In the story you write, you are the storyteller. While you should use memorable and telling quotations throughout the article, the majority of information should be in your own words, based on information you received through interviews and research.
Create a clear narrative. Even when writing a profile on someone, his life has a story -- it isn't just a collection of facts. Determine the compelling and relevant details of someone's life to create a cogent narrative. For example, you may write about how an injured athlete struggled with physical therapy to get back on the field, or how an impoverished child grew up to become a successful businessperson. When you understand the story's purpose, you can more easily use your information to that end.