For example the American Haiku Society only requires that the poem be short and refer to nature. Now it's your turn to write. You will be surprised how much you can express with just a few nouns and verbs. For years you have been studying grammar and words in High School. Now communicate your feelings, tell an interesting story, by speaking just a few lines.
Imagination is an interesting word to consider.
Use a newspaper for ideas. Next, write in names of food , flowers and weather. Keep them short . Line one and two should be different images. Use line 3 to bring the 2 images together.