Repetition
Repetition is basic to most poetry. Repeat key words, sounds and phrases for emphasis. Repetition makes us pay attention, echoes important themes and images. Blues are a good example of how to use repetition. Repetition is comforting and familiar, but don't rely on it to carry your message. Intersperse with change and innovation. But it is powerful; think of prayers and chants as another example. Repetition can be overdone but used well it's a great technique. I like internal repetition too: assonance and consonance - repeating sounds within the line. Also don't think of grammar as a dirty word; understand it, unlock it. For example, try an appositive - adding one thing beside the other: My grandfather, Ben, a large man with a laugh like a Christmas elf, stands in his workroom, etc. Use a noun, then clump a phrase to the right of it to bring it to life.