If your sentences are longer than 20 words, get out the red pencil. Cut the cute. All good writers are good rewriters. Break rules you learned in eighth grade English. It's okay to end sentences with prepositions.
Sentence fragments are okay too.
So are one-sentence paragraphs. And go ahead, begin that next sentence with a conjunction. Anything that helps the reader slide smoothly through the material. Avoid technical jargon. These words may sound important, but people probably won't know what you're talking about.