1. Read, read read! Classic poems for children and adults, books about poetry. Never trust anyone who writes more than he or she reads. Even if you want to write free verse, learn verse forms and metrics until your eyes glaze over. You can break those rules, but only after you have learned them first.
2. Make a dictionary your best friend, no matter how geeky that sounds. Most children will speak only one language in their lifetimes, so why not make your fluency in that language as masterful as you can.
3. If you say you want to be a writer (prose or poetry), I applaud you. The next words out of your mouth should be, “But I promise to be a rewriter!” I don’t even know why we use the word “writer.” All the great writers in the world have been rewriters. So buy yourself a big wastebasket, and keep it filled.