Write in free verse. Free verse is poetry without formula, a post-modern liberty of style. When writing in free verse, forget about rules and calculations. Start with the meaning and inspiration of any poem, the muse. Let your creativity run wild. Focus on powerful, provocative words in order to make up for lack of form and try to keep it quite short. Look at Allen Ginsberg's "Song". All form is replaced by pure feeling. He wrote in an explosion of emotion, out of his mind, through the pen and on to the paper.
Write in blank verse. Blank verse is old, but still quite popular. First thing to do when writing blank verse is to find a meter. The iambic meter is an easy one to start with. It is two syllables with the second one stressed. For example, da-DUM, da-DUM. Find your length. Blank verse is usually written using paremeter, which is five instances using your meter in every line. Develop your theme and follow your muse. Remember, without inspiration there is no poem.
Write in light verse. "Light" refers to the treatment of the subject, not the subject itself. Typically light verse contains the use of rhythm and rhyme. When writing light verse you should feel the language, play with the language and find the music in the language. Good light verse needs to be enjoyable for its exuberance, for the rhythm and the music. So read it out loud when writing. Rhythm is something you feel and hear. It is also important to keep it fun and humorous.
Write in echo verse. Echo is the verse in which the last syllable or second last syllable of a line is repeated. This might be with different spelling or another meaning, as if it is echoing; usually this echo will be indented to a point under or ahead of the syllable it mimics and will function as an independent line of one or two syllables.