Look at the poems as if you wrote them. Ask yourself why these poets approached their subjects the way they did. Why they used the language they did. When you find a poem you like, try writing a response. Keep a file folder or journal of your writing.
Poets use punctuation and the shape of the poem on the page to help the reader.
Your concentrated, imaginative and challenging use of language should tell the reader that it's a poem. When you write about important, powerful events in your life, let the power of the moment shine through without resorting to something contrived. Decide how you want the poem to look on the page. Use all the many writer's tools you have available to you. Watch out for archaic language and ungainly, inverted word order.