And, but, for, nor, or, so, yet

Starting a sentence with a conjunction is a literary device that can be overused. And it can be annoying. But there's nothing inherently evil about it.

From a good book on writing, The Elephants of Style, by Bill Walsh, a copy editor at the Washington Post, available at fine bookstores everywhere and at Booth Library. Call number: PE2827.W35 2004.