In good writing, the strongest part of a sentence belongs at the end, not the beginning. For example, don’t end a sentence with “in 2010” or any date. That’s weak and boring, a real letdown. Instead, start the sentence “In 2010” and end with something powerful enough to carry the reader on to the next sentence. The same goes for paragraphs and chapters. End each with a strong sentence with an ending that will make the reader want to read further.