A sonnet is a 14-line poem that has two main types which are English (Shakespearean) and Italian (Petrarchan). The sonnet is a kind of poem that has strict rules. It should only be in the pattern that it is supposed to be.
Another interesting form of writing is Poetry. There are a few restrictions in writing a poem though it can be done freely. It is a very good way to express the feeling of a writer. Poetry is something that anyone can do.
This article speaks about the procedures to be followed by a teen for publishing his poems in online, print or other magazines and journals